Updated on 2025/03/29

写真b

 
KURITA Kazuyoshi
 
*Items subject to periodic update by Rikkyo University (The rest are reprinted from information registered on researchmap.)
Affiliation*
College of Science Department of Physics
Graduate School of Science Doctoral Program in Physics
Graduate School of Science Master's Program in Physics
Title*
Professor
Degree
Ph.D(物理学) ( コロンビア大学(アメリカ合衆国) ) / Ph.D ( Columbia University, Graduate School of Arts and Sciences )
Contact information
Mail Address
Research Interests
  • nuclear structure

  • unstabel nuclei

  • electron scattering

  • 宇宙初期

  • 偏極陽子

  • 量子色力学

  • 重イオン反応

  • ポーラリメーター

  • Campus Career*
    • 4 2009 - Present 
      College of Science   Department of Physics   Professor
    • 4 2009 - Present 
      Graduate School of Science   Master's Program in Physics   Professor
    • 4 2009 - Present 
      Graduate School of Science   Doctoral Program in Physics   Professor
    • 4 2007 - 3 2009 
      College of Science   Department of Physics   Associate Professor
    • 4 2007 - 3 2009 
      Graduate School of Science   Master's Program in Physics   Associate Professor
    • 4 2007 - 3 2009 
      Graduate School of Science   Doctoral Program in Physics   Associate Professor
    • 4 2002 - 3 2007 
      College of Science   Department of Physics   Associate Professor (as old post name)
    • 4 2005 - 3 2007 
      Graduate School of Science   Master's Program in Physics   Associate Professor (as old post name)
    • 4 2005 - 3 2007 
      Graduate School of Science   Doctoral Program in Physics   Associate Professor (as old post name)

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    Research Areas

    • Natural Science / Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics

    Research History

    • 4 2025 - Present 
      立教大学,理学研究科 物理学専攻,前期主任

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    • 9 2012 - Present 
      RIKKYO UNIVERSITY   College of Science

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    • 4 2009 - Present 
      RIKKYO UNIVERSITY   Graduate School of Science Field of Study: Physics   Professor

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    • 4 2009 - Present 
      RIKKYO UNIVERSITY   Graduate School of Science Field of Study: Physics   Professor

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    • 4 2009 - Present 
      RIKKYO UNIVERSITY   College of Science Department of Physics   Professor

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    • 4 2003 - Present 
      RIKKYO UNIVERSITY   College of Science

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    • 4 2023 - 3 2024 
      立教大学,理学部 物理学科,学科長

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    • 4 2020 - 3 2021 
      立教大学,入学センター,センター長

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    • 4 2018 - 3 2020 
      RIKKYO UNIVERSITY   Center for Development and Support of Higher Education   Director

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    • 4 2018 - 3 2019 
      RIKKYO UNIVERSITY   Center for Development and Support of Higher Education   Vice Director

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    • 4 2015 - 3 2018 
      RIKKYO UNIVERSITY   Graduate School of Science Research Center for Measurement in Advanced Science   Director

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    • 4 2012 - 3 2015 
      RIKKYO UNIVERSITY   Graduate School of Science Research Center for Measurement in Advanced Science   Vice Director

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    • 4 2011 - 3 2012 
      RIKKYO UNIVERSITY   Careea Office

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    • 4 2008 - 3 2010 
      RIKKYO UNIVERSITY   Coop Assistance

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    • 4 2007 - 3 2009 
      RIKKYO UNIVERSITY   College of Science Department of Physics   Chairman

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    • 4 2007 - 3 2008 
      RIKKYO UNIVERSITY   Graduate School of Science   Associate Professor

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    • 4 2007 - 3 2008 
      RIKKYO UNIVERSITY   College of Science Department of Physics   Associate Professor

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    • 4 2002 - 3 2007 
      RIKKYO UNIVERSITY   Graduate School of Science   Associate Professor (as old post name)

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    • 4 2002 - 3 2007 
      RIKKYO UNIVERSITY   College of Science Department of Physics   Associate Professor (as old post name)

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    • 4 2000 - 3 2002 
      RIKEN

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    • 10 1997 - 3 2000 
      理化学研究所   基礎特別研究員

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    • 4 1997 - 10 1997 
      理化学研究所   奨励研究員

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    • 4 1994 - 3 1997 
      University of Tsukuba   Institute of Physics

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    • 6 1991 - 3 1994 
      University of Tsukuba   Institute of Physics

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    Education

    • - 2 1992 
      Columbia University

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      Country: United States

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    • - 3 1986 
      The University of Tokyo   Faculty of Science

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      Country: Japan

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    Committee Memberships

    • 6 2015 - 5 2021 
      日本物理教育学会   理事

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      Committee type:Academic society

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    • 4 2015 - 3 2017 
      日本物理学会   選挙管理委員

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      Committee type:Academic society

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    • 4 2013 - 3 2015 
      日本物理教育学会   編集委員

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      Committee type:Academic society

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    • 4 2011 - 3 2014 
      日本物理教育学会   評議員

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      Committee type:Academic society

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    Awards

    • 5 2006  
      Beam Instrumentation Workshop  Faraday Cup Award 
       
      Kazuyoshi Kurita, Haixin Huang

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      Award type:Award from international society, conference, symposium, etc.  Country:United States

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    Papers

    • First Observation of Electron Scattering from Online-Produced Radioactive Target

      K. Tsukada, Y. Abe, A. Enokizono, T. Goke, M. Hara, Y. Honda, T. Hori, S. Ichikawa, Y. Ito, K. Kurita, C. Legris, Y. Maehara, T. Ohnishi, R. Ogawara, T. Suda, T. Tamae, M. Wakasugi, M. Watanabe, H. Wauke

      Physical Review Letters   30 8 2023

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      Publishing type:Research paper (scientific journal)  

      DOI: 10.1103/PhysRevLett.131.092502

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    • Ion-trapping properties of SCRIT: Time evolutions of 138Ba charge state distributions

      R. Ogawara, Y. Abe, T. Ohnishi, A. Enokizono, M. Hara, T. Hori, S. Ichikawa, K. Kurita, Y. Maehara, T. Suda, K. Tsukada, M. Wakasugi, M. Watanabe, H. Wauke

      Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms541   90 - 92   8 2023

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      Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

      DOI: 10.1016/j.nimb.2023.04.048

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    • Fringing-RF-Field-Activated DC-to-Pulse Converter at the SCRIT Electron Scattering Facility

      Masanori Wakasugi, Mamoru Togasaki, Tetsuya Ohnishi, Kazuyoshi Kurita, Ryota Toba, Masamitsu Watanabe, Kohei Yamada

      Proceedings of 10th International Conference on Nuclear Physics at Storage Rings (STORI’17)   14 6 2021

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      Publishing type:Research paper (international conference proceedings)   Publisher:Journal of the Physical Society of Japan  

      DOI: 10.7566/jpscp.35.011028

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    • Present status of electron-beam-driven RI separator for SCRIT at RIKEN RI Beam Factory Peer-reviewed

      T. Ohnishi, S. Ichikawa, M. Nakano, K. Kurita, M. Wakasugi

      Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms463   290 - 292   1 2020

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      Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

      DOI: 10.1016/j.nimb.2019.05.006

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    • Electron scattering from Pb-208 and Xe-132 ions at the SCRIT facility Peer-reviewed

      Tsukada, Kyo, Adachi, Kousuke, Enokizono, Akitomo, Fujita, Takahiro, Hara, Masahiro, Hori, Toshitada, Hori, Mitsuki, Ichikawa, Shin-ichi, Kasama, Keita, Kurita, Kazuyoshi, Namba, Kazuki, Ohnishi, Tetsuya, Suda, Toshimi, Tamae, Tadaaki, Togasaki, Mamoru, Wakasugi, Masanori, Watanabe, Masamitsu, Yamada, Kouhei

      HYPERFINE INTERACTIONS240 ( 1 )   9 2019

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      Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:SPRINGER INTERNATIONAL PUBLISHING AG  

      We constructed the SCRIT (Self-Confining Radioactive Ion Target) electron scattering facility to realize electron scattering off short-lived unstable nuclei at RIKEN in Japan. Electron scattering is one of the most powerful and reliable tools to study structures of atomic nuclei. However, it has been extremely difficult to apply electron scattering to unstable nuclei because of target preparation problems. SCRIT is a novel ion-trapping technique that achieves high luminosity of more than 10(27) cm(-?2)s(-?1) with a small amount of target ions. Following completion of the facility, a series of commissioning experiments of the entire facility with several stable nuclear targets, including Pb-208 and Xe-132, were performed. Momentum transfer distributions of elastic scattering from those targets were successfully measured at several electron beam energies, and the charge density distribution of the Xe-132 nucleus was extracted for the first time.

      DOI: 10.1007/s10751-019-1635-2

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    • First Elastic Electron Scattering from Xe 132 at the SCRIT Facility Peer-reviewed

      K. Tsukada, A. Enokizono, T. Ohnishi, K. Adachi, T. Fujita, M. Hara, M. Hori, T. Hori, S. Ichikawa, K. Kurita, K. Matsuda, T. Suda, T. Tamae, M. Togasaki, M. Wakasugi, M. Watanabe, K. Yamada

      Physical Review Letters118 ( 26 ) 262501 - 262501   27 6 2017

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Physical Society  

      The first elastic electron scattering has been successfully performed at the self-confining radioactive-isotope ion target (SCRIT) facility, the world's first electron scattering facility for SCRIT technique achieved high luminosity (over 1027 cm-2 s-1, sufficient for determining the nuclear shape) with only 108 target ions. While Xe132 used in this time as a target is a stable isotope, the charge density distribution was first extracted from the momentum transfer distributions of the scattered electrons by comparing the results with those calculated by a phase shift calculation.

      DOI: 10.1103/PhysRevLett.118.262501

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    • Development of a Buffer Gas-Free Buncher for Low Energy RI Ion Beam

      M. Togasaki, M. Wakasugi, K. Kurita

      HIAT2015WEPB25   253 - 255   2 2016

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      Language:English   Publisher:JACoW  

      DOI: 10.18429/JACoW-HIAT2015-WEPB25

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    • 20pAX-11 Measurement of the angular distribution of electron scattering on the Xe isotope target with SCRIT

      Tsukada K., Adachi K., Ichikawa S., Enokizono A., Ohnishi T., Kurita K., Suda T., Tamae T., Tsuru T., Togasaki M., Hara M., Fujita T., Hori T., Hori M., Matsuda K., Yamada K., Wakasugi M., Watanabe M.

      Meeting Abstracts of the Physical Society of Japan71   337 - 337   2016

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      Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

      DOI: 10.11316/jpsgaiyo.71.1.0_337

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    • 20pAX-12 Measuring luminosity of electron scattering from Xe isotopes at the SCRIT experiment

      Enokizono A., Adachi K., Ichikawa S., Ohnishi T., Kurita K., Suda T., Tamae T., Tsukada K., Togasaki M., Hara M., Fujita T., Hori M., Hori T., Matsuda K., Yamada K., Wakasugi M., Watanabe M.

      Meeting Abstracts of the Physical Society of Japan71   338 - 338   2016

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      Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

      DOI: 10.11316/jpsgaiyo.71.1.0_338

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    • Charge density distribution of <sup>132</sup>Xe measured with SCRIT

      Tsukada K., Adachi K., Ichikawa S., Enokizono A., Ohnishi T., Kurita K., Suda T., Tamae T., Togasaki M., Hara M., Fujita T., Hori T., Hori M., Yamada K., Wakasugi M., Watanabe M.

      Meeting Abstracts of the Physical Society of Japan71   273 - 273   2016

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      Language:Japanese   Publisher:The Physical Society of Japan  

      DOI: 10.11316/jpsgaiyo.71.2.0_273

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    • Measuring luminosity of electron scaterring on <sup>132</sup>Xe isotope target at the SCRIT experiment

      Fujita T., Adachi K., Ichikawa S., Enokizono A., Ohnishi T., Kurita K., Suda T., Tamae T., Tsukada K., Togasaki M., Hara M., Hori T., Hori M., Matsuda K., Yamada K., Wakasugi M., Watanabe M.

      Meeting Abstracts of the Physical Society of Japan71   272 - 272   2016

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      Language:Japanese   Publisher:The Physical Society of Japan  

      DOI: 10.11316/jpsgaiyo.71.2.0_272

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    • 26pSH-3 Development of an ion beam cooler and buncher for the SCRIT experiment

      Togasaki M., Ohnishi T., Kurita K., Toba R., Hara M., Yamada K., Wakasugi M.

      Meeting Abstracts of the Physical Society of Japan70   281 - 281   2015

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      Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

      DOI: 10.11316/jpsgaiyo.70.2.0_281

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    • 26pSH-2 Measuring the luminosity of electron scattering from nuclei at the SCRIT facility

      Enokizono A., Adachi K., Ichikawa S., Ohnishi T., Kurita K., Koshoji Y., Suda T., Tamae T., Tsukada K., Tsuru T., Togasaki M., Hara M., Fujita T., Hori T., Matsuda K., Yamada K., Wakasugi M., Watanabe M.

      Meeting Abstracts of the Physical Society of Japan70   280 - 280   2015

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      Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

      DOI: 10.11316/jpsgaiyo.70.2.0_280

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    • 26pSH-1 Acceptance study of the electron spectrometer for electron scattering off unstable nuclei with SCRIT

      Tsukada K., Ichikawa S., Enokizono A., Ohnishi T., Kurita K., Koshoji Y., Suda T., Tamae T., Tsuru T., Togasaki M., Hara M., Hori T., Matsuda K., Yamada K., Wakasugi M., Watanabe M.

      Meeting Abstracts of the Physical Society of Japan70   279 - 279   2015

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      Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

      DOI: 10.11316/jpsgaiyo.70.2.0_279

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    • 22pCF-4 Development of the scattered electron spectrometer for SCRIT experiment

      Matsuo S., Ichikawa S., Enokizono A., Ohnishi T., Kurita K., Suda T., Tamae T., Tsukada K., Tsuru T., Togasaki M., Hara M., Hori T., Matsuda K., Moriya Y., Yoneyama S., Wakasugi M.

      Meeting Abstracts of the Physical Society of Japan70   340 - 340   2015

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      Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

      DOI: 10.11316/jpsgaiyo.70.1.0_340

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    • 21aCD-13 Momentum resolution and acceptance study of the electron spectrometer at SCRIT electron scattering facility

      Tsukada K., Ichikawa S., Enokizono A., Ohnishi T., Kurita K., Suda T., Tamae T., Tsuru T., Togasaki M., Hori T., Hara M., Matsuo S., Matsuda K., Moriya Y., Yoneyama S., Wakasugi M.

      Meeting Abstracts of the Physical Society of Japan70   243 - 243   2015

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      Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

      DOI: 10.11316/jpsgaiyo.70.1.0_243

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    • 23pCF-10 A Luminosity Monitor for SCRIT experiment

      Yoneyama S., Enokizono A., Ohnishi T., Kurita K., Sudo T., Tamae T., Tsukada K., Tsuru T., Togasaki M., Matsuo S., Mastuda K., Moriya Y., Wakasugi M.

      Meeting Abstracts of the Physical Society of Japan70   361 - 361   2015

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      Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

      DOI: 10.11316/jpsgaiyo.70.1.0_361

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    • Development of a Femoto Scope for Short-Lived Unstalbe Nuclei Peer-reviewed

      Masanori Wakasugi, Tetsuya Ohnishi, Toshimi Suda, Kazuyoshi Kurita

      Butsuri68 ( 12 ) 810 - 817   12 2013

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      Language:Japanese   Publishing type:Research paper (scientific journal)  

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    • Electron-beam-driven RI separator for SCRIT (ERIS) at RIKEN RI beam factory Peer-reviewed

      Ryo OgawaraT.Ohnishi, S.Ichikawa, K.Koizumi, K.Kurita, Y.Miyashita, R.Ogawara, S.Tamaki, M.Togasaki, M.Wakasugi

      Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms317 ( 15 ) 357 - 360   8 2013

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      Language:English   Publishing type:Research paper (international conference proceedings)  

      DOI: 10.1016/j.nimb.2013.07.029

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    • Construction of the SCRIT electron scattering facility at the RIKEN RI Beam Factory Peer-reviewed

      Wakasugi, M. Ohnishi, T. Wang, S. Miyashita, Y. Adachi, T. Amagai, T. Enokizono, A. Enomoto, A. Haraguchi, Y. Hara, M. Hori, T. Ichikawa, S. Kikuchi, T. Kitazawa, R. Koizumi, K. Kurita, K. Miyamoto, T. Ogawara, R. Shimakura, Y. Takehara, H. Tamae, T. Tamaki, S. Togasaki, M. Yamaguchi, T. Yanagi, K. Suda, T

      Nucl. Instrum. and MethodB317   668 - 673   2013

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      Language:English   Publishing type:Research paper (scientific journal)  

      DOI: 10.1016/j.nimb.2013.04.037

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    • Ion-trapping properties of SCRIT

      R. Ogawara, M. Wakasugi, K. Kurita

      Nuclear Instruments and MethodsB317   674 - 678   2013

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      Language:English   Publisher:Elsevier  

      DOI: 10.1016/j.nimb.2013.08.014

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    • Development of an Amplifier IC with Wide Dynamic Range for Si Detector in RIKEN SAMURAI Spectrometer

      A. Takuma, A. Taketani, H. Murakami, K. Kurita, M. Kurokawa, M. Tanaka

      2012 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE RECORD (NSS/MIC)2012   854 - 857   2012

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      Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:IEEE  

      A large acceptance and high magnetic rigidity spectrometer facility, SAMURAI is under construction at RIKEN. We plan to perform breakup reaction experiments that focus on the proton rich nuclei structure. The Si tracker needs to detect multiple nuclear fragments from the breakup reaction simultaneously. Atomic numbers of those fragments lie between 1 and 50. In the case of Sn breakup reaction, the energy deposition of fully stripped Z=50 fragment is 2500 times as large as that of Z=1 fragment. In order to realize such measurements, an amplifier with wide dynamic range of more than 2500 is required. Because it must operate under vacuum, it is necessary to minimize the amount of material. Therefore, we developed an amplifier IC which satisfies the requirements by implementing a square root gain response circuit.

      DOI: 10.1109/NSSMIC.2012.6551225

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    • Nuclear physics at the SCRIT electron scattering facility Peer-reviewed

      Toshimi Suda, Tatsuya Adachi, Tatsuya Amagai, Akitomo Enokizono, Masahiro Hara, Toshitada Hori, Shin'ichi Ichikawa, Kazuyoshi Kurita, Takaya Miyamoto, Ryo Ogawara, Tetsuya Ohnishi, Yuuto Shimakura, Tadaaki Tamae, Mamoru Togasaki, Masanori Wakasugi, Shuo Wang, Kayoko Yanagi

      PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS2012 ( 1 ) 03C008 - 03C008   2012

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:OXFORD UNIV PRESS INC  

      The SCRIT electron scattering facility is under construction at the RIKEN RI Beam Factory. This is the world's first facility dedicated to the study of the structure of short-lived nuclei by electron scattering, which has been a long-standing dream for nuclear physics. A novel Self-Confining RI Target (SCRIT) technique makes this challenging research possible. A series of test experiments using stable nuclei performed at this partially completed facility show that the collision luminosity between electron beam and target nucleus reaches 10(27) cm(-2) s(-1), which is required for an elastic electron scattering measurement to determine the charge density distribution of the target nucleus. The first electron scattering for unstable Sn isotopes will take place in the year 2014.

      DOI: 10.1093/ptep/pts043

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    • Assembly procedure for the silicon pixel ladder for PHENIX silicon vertex tracker Peer-reviewed

      Y. Onuki, Y. Akiba, H. En&apos;yo, K. Fujiwara, Y. Haki, K. Hashimoto, R. Ichimiya, M. Kasai, M. Kawashima, K. Kurita, M. Kurosawa, E. J. Mannel, K. Nakano, R. Pak, M. Sekimoto, W. E. Sondheim, A. Taketani, M. Togawa, Y. Yamamoto

      NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT606 ( 3 ) 395 - 403   7 2009

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE BV  

      The silicon vertex tracker (VTX) will be installed in the summer of 2010 to enhance the physics capabilities of the Pioneering High Energy Nuclear Interaction eXperiment (PHENIX) experiment at Brookhaven National Laboratory. The VTX consists of two types of silicon detectors: a pixel detector and a strip detector. The pixel detector consists of 30 pixel ladders placed on the two inner cylindrical layers of the VTX. The ladders are required to be assembled with high precision, however, they should be assembled in both cost and time efficient manner. We have developed an assembly bench for the ladder with several assembly fixtures and a quality assurance (Q/A) system using a 3D measurement machine. We have also developed an assembly procedure for the ladder, including a method for dispensing adhesive uniformly and encapsulation of bonding wires. The developed procedures were adopted in the assembly of the first pixel ladder and satisfy the requirements. (C) 2009 Elsevier B.V. All rights reserved.

      DOI: 10.1016/j.nima.2009.04.041

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    • First Demonstration of Electron Scattering Using a Novel Target Developed for Short-Lived Nuclei Peer-reviewed

      T. Suda, M. Wakasugi, T. Emoto, K. Ishii, S. Ito, K. Kurita, A. Kuwajima, A. Noda, T. Shirai, T. Tamae, H. Tongu, S. Wang, Y. Yano

      PHYSICAL REVIEW LETTERS102 ( 10 ) 102501 - 102501   3 2009

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER PHYSICAL SOC  

      We carried out a demonstrative electron scattering experiment using a novel ion-trap target exclusively developed for short-lived highly unstable nuclei. Using stable (133)Cs ion as a target, this experiment completely mimicked electron scattering off short-lived nuclei. Achieving a luminosity higher than 10(26) cm(-2) s(-1) with around only 10(6) trapped ions on the electron beam, the angular distribution of elastic scattering was successfully measured. This experiment clearly demonstrates that electron scattering off rarely produced short-lived nuclei is practical with this target technique.

      DOI: 10.1103/PhysRevLett.102.102501

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    • Electron scattering based on a novel internal target technique: SCRIT

      M. Wakasugi, T. Emoto, S. Ito, S. Wang, T. Suda, Y. Yano, K. Kurita, K. Ishii, T. Tamae, A. Kuwajima, A. Noda, T. Shiari, H. Tongu

      European Physical Journal A42 ( 3 ) 453 - 456   2009

    • ELECTRON SCATTERING OFF SHORT-LIVED RADIOACTIVE NUCLEI

      S. Wang, T. Emoto, Y. Furukawa, K. Ishii, S. Ito, T. Koseki, K. Kurita, A. Kuwajima, T. Masuda, A. Morikawa, M. Nakamura, A. Noda, T. Ohnishi, T. Shirai, T. Suda, H. Takeda, T. Tamae, H. Tongu, M. Wakasugi, Y. Yano

      International Journal of Modern Physics E-Nuclear Physics18   518-523   2009

    • Novel internal target for electron scattering off unstable nuclei Peer-reviewed

      M. Wakasugi, T. Emoto, Y. Furukawa, K. Ishii, S. Ito, T. Koseki, K. Kurita, A. Kuwajima, T. Masuda, A. Morikawa, M. Nakamura, A. Noda, T. Ohnishi, T. Shirai, T. Suda, H. Takeda, T. Tamae, H. Tongu, S. Wang, Y. Yano

      Physical Review Letters100 ( 16 ) 164801   22 4 2008

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      Language:English   Publishing type:Research paper (scientific journal)  

      A novel internal target has been developed, which will make electron scattering off short-lived radioactive nuclei possible in an electron storage ring. An "ion trapping" phenomenon in the electron storage ring was successfully utilized for the first time to form the target for electron scattering. Approximately 7×106 stable Cs133 ions were trapped along the electron beam axis for 85ms at an electron beam current of 80mA. The collision luminosity between the stored electrons and trapped Cs ions was determined to be 2.4(8)×1025cm-2s-1 by measuring elastically scattered electrons. © 2008 The American Physical Society.

      DOI: 10.1103/PhysRevLett.100.164801

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    • Novel internal target for electron scattering off unstable nuclei

      M. Wakasugi, T. Emoto, Y. Furukawa, K. Ishii, S. Ito, T. Koseki, K. Kurita, A. Kuwajima, T. Masuda, A. Morikawa, M. Nakamura, A. Noda, T. Ohnishi, T. Shirai, T. Suda, H. Takeda, T. Tamae, H. Tongu, S. Wang, Y. Yano

      Physical Review Letters100   2008

    • A novel radioactive isotope ion target SCRIT Peer-reviewed

      Kurita, Kazuyoshi, Masuda, Tetsuya, Koseki, Tadashi, Noda, Akira, Shirai, Toshiyuki, Tongu, Hiromu, Furukawa, Yukihiro, Tamae, Tadaaki, Ito, Sachiko, Ohnishi, Tetsuya, Suda, Toshimi, Takeda, Hiroyuki, Wang, Shuo, Emoto, Takashi, Nakamura, Masato, Wakasugi, Masanori, Yano, Yasushige

      BEAM INSTRUMENTATION WORKSHOP 2006868   384 - +   2006

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      Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:AMER INST PHYSICS  

      Electron scattering is a superior method to investigate the internal structure, such as charge distribution, of atomic nuclei. Most of the radii of nuclei were determined unambiguously by that. However, radioactive isotopes (RI) which recently came up to a major research interest have not been accessible due to the difficulty in making fixed targets and taking measurements before they decay. We proposed a conceptually new target called SCRIT (Self-Confining Radioactive Isotope ion Target)* as opposed to a collider method. The luminosity expected for SCRIT is inevitably low (typically on the order of 1.E+27/cm2/s) and a large acceptance detector system is required. We plan to perform a coincidence measurement using an electron arm and a recoil ion detector which needs to be developed. Current status of the ion trapping with a prototype SCRIT and the background measurement results in an electron storage ring will be discussed.

      DOI: 10.1063/1.2401427

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    • Fiddling carbon strings with polarized proton beams Invited Peer-reviewed

      Haixin Huang, Kazuyoshi Kurita

      BEAM INSTRUMENTATION WORKSHOP 2006868   3 - +   2006

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      Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:AMER INST PHYSICS  

      An innovative polarimeter based on proton carbon elastic scattering in the Coulomb Nuclear Interference (CNI) region was first successfully tested in the Brookhaven AGS. CNI Polarimeters were then installed in the AGS and both RHIC rings. The polarimeter consists of ultra-thin carbon targets and silicon strip detectors. The waveform digitizers used for signal readout allow deadtime-less data processing on the fly. Polarimeters are crucial instrumentation for the RHIC spin physics program. This paper summarizes the polarimeter design issues and operation results.

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    • Nuclear modification factors for hadrons at forward and backward rapidities in deuteron-gold collisions at root s(NN)=200 GeV

      SS Adler, S Afanasiev, C Aidala, NN Ajitanand, Y Akiba, A Al-Jamel, J Alexander, K Aoki, L Aphecetche, R Armendariz, SH Aronson, R Averbeck, TC Awes, Babintsev, V, A Baldisseri, KN Barish, PD Barnes, B Bassalleck, S Bathe, S Batsouli, Baublis, V, F Bauer, A Bazilevsky, S Belikov, MT Bjorndal, JG Boissevain, H Borel, ML Brooks, DS Brown, N Bruner, D Bucher, H Buesching, Bumazhnov, V, G Bunce, JM Burward-Hoy, S Butsyk, Camard, X, P Chand, WC Chang, S Chernichenko, CY Chi, J Chiba, M Chiu, IJ Choi, RK Choudhury, T Chujo, Cianciolo, V, Y Cobigo, BA Cole, MP Comets, P Constantin, M Csanad, T Csorgo, JP Cussonneau, D d'Enterria, K Das, G David, F Deak, H Delagrange, A Denisov, A Deshpande, EJ Desmond, A Devismes, O Dietzsch, JL Drachenberg, O Drapier, A Drees, A Durum, D Dutta, Dzhordzhadze, V, YV Efremenko, H En'yo, B Espagnon, S Esumi, DE Fields, C Finck, F Fleuret, SL Fokin, BD Fox, Z Fraenkel, JE Frantz, A Franz, AD Frawley, Y Fukao, SY Fung, S Gadrat, M Germain, A Glenn, M Gonin, J Gosset, Y Goto, R Granier de Cassagnac, N Grau, SV Greene, M Grosse Perdekamp, HA Gustafsson, T Hachiya, JS Haggerty, H Hamagaki, AG Hansen, EP Hartouni, M Harvey, K Hasuko, R Hayano, He, X, M Heffner, TK Hemmick, JM Heuser, P Hidas, H Hiejima, JC Hill, R Hobbs, W Holzmann, K Homma, B Hong, A Hoover, T Horaguchi, T Ichihara, VV Ikonnikov, K Imai, M Inaba, M Inuzuka, D Isenhower, L Isenhower, M Ishihara, M Issah, A Isupov, BV Jacak, J Jia, O Jinnouchi, BM Johnson, SC Johnson, KS Joo, D Jouan, F Kajihara, S Kametani, N Kamihara, M Kaneta, JH Kang, K Katou, T Kawabata, A Kazantsev, S Kelly, B Khachaturov, A Khanzadeev, J Kikuchi, DJ Kim, E Kim, GB Kim, HJ Kim, E Kinney, A Kiss, E Kistenev, A Kiyomichi, C Klein-Boesing, H Kobayashi, L Kochenda, Kochetkov, V, R Kohara, B Komkov, M Konno, D Kotchetkov, A Kozlov, PJ Kroon, CH Kuberg, GJ Kunde, K Kurita, MJ Kweon, Y Kwon, GS Kyle, R Lacey, JG Lajoie, Y Le Bornec, A Lebedev, S Leckey, DM Lee, MJ Leitch, MAL Leite, XH Li, H Lim, A Litvinenko, MX Liu, CF Maguire, YI Makdisi, A Malakhov, Manko, VI, Y Mao, G Martinez, H Masui, F Matathias, T Matsumoto, MC McCain, PL McGaughey, Y Miake, TE Miller, A Milov, S Mioduszewski, GC Mishra, JT Mitchell, AK Mohanty, DP Morrison, JM Moss, D Mukhopadhyay, M Muniruzzaman, S Nagamiya, JL Nagle, T Nakamura, J Newby, AS Nyanin, J Nystrand, E O'Brien, CA Ogilvie, H Ohnishi, ID Ojha, H Okada, K Okada, A Oskarsson, Otterlund, I, K Oyama, K Ozawa, D Pal, APT Palounek, Pantuev, V, Papavassiliou, V, J Park, WJ Park, SF Pate, H Pei, Penev, V, JC Peng, H Pereira, Peresedov, V, A Pierson, C Pinkenburg, RP Pisani, ML Purschke, AK Purwar, JM Qualls, J Rak, Ravinovich, I, KF Read, M Reuter, K Reygers, Riabov, V, Y Riabov, G Roche, A Romana, M Rosati, SSE Rosendahl, P Rosnet, VL Rykov, SS Ryu, N Saito, T Sakaguchi, S Sakai, Samsonov, V, L Sanfratello, R Santo, HD Sato, S Sato, S Sawada, Y Schutz, Semenov, V, R Seto, TK Shea, Shein, I, TA Shibata, K Shigaki, M Shimomura, A Sickles, CL Silva, D Silvermyr, KS Sim, A Soldatov, RA Soltz, WE Sondheim, SP Sorensen, Sourikova, IV, F Staley, PW Stankus, E Stenlund, M Stepanov, A Ster, SP Stoll, T Sugitate, JP Sullivan, S Takagi, EM Takagui, A Taketani, KH Tanaka, Y Tanaka, K Tanida, MJ Tannenbaum, A Taranenko, P Tarjan, TL Thomas, M Togawa, J Tojo, H Torii, RS Towell, VN Tram, Tserruya, I, Y Tsuchimoto, H Tydesjo, N Tyurin, TJ Uam, HW van Hecke, J Velkovska, M Velkovsky, Veszpremi, V, AA Vinogradov, MA Volkov, E Vznuzdaev, XR Wang, Y Watanabe, SN White, N Willis, FK Wohn, CL Woody, W Xie, A Yanovich, S Yokkaichi, GR Young, IE Yushmanov, WA Zajc, C Zhang, S Zhou, J Zimanyi, L Zolin, Zong, X

      PHYSICAL REVIEW LETTERS94 ( 8 ) 6   3 2005

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER PHYSICAL SOC  

      We report on charged hadron production in deuteron-gold reactions at roots(NN) = 200 GeV. Our measurements in the deuteron direction cover 1.4&lt;eta&lt;2.2, referred to as forward rapidity, and in the gold direction -2.0&lt;eta&lt;-1.4, referred to as backward rapidity, and a transverse momentum range p(T)=0.5-4.0 GeV/c. We compare the relative yields for different deuteron-gold collision centrality classes. We observe a suppression relative to binary collision scaling at forward rapidity, sensitive to low momentum fraction (x) partons in the gold nucleus, and an enhancement at backward rapidity, sensitive to high momentum fraction partons in the gold nucleus.

      DOI: 10.1103/PhysRevLett.94.082302

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    • Measurement of single electron event anisotropy in Au+Au collisions at sNN=200 GeV

      S. S. Adler, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, J. Alexander, R. Amirikas, L. Aphecetche, S. H. Aronson, R. Averbeck, T. C. Awes, R. Azmoun, V. Babintsev, A. Baldisseri, K. N. Barish, P. D. Barnes, B. Bassalleck, S. Bathe, S. Batsouli, V. Baublis, A. Bazilevsky, S. Belikov, Y. Berdnikov, S. Bhagavatula, J. G. Boissevain, H. Borel, S. Borenstein, M. L. Brooks, D. S. Brown, N. Bruner, D. Bucher, H. Buesching, V. Bumazhnov, G. Bunce, J. M. Burward-Hoy, S. Butsyk, X. Camard, J. S. Chai, P. Chand, W. C. Chang, S. Chernichenko, C. Y. Chi, J. Chiba, M. Chiu, I. J. Choi, J. Choi, R. K. Choudhury, T. Chujo, V. Cianciolo, Y. Cobigo, B. A. Cole, P. Constantin, D. d'Enterria, G. David, H. Delagrange, A. Denisov, A. Deshpande, E. J. Desmond, A. Devismes, O. Dietzsch, O. Drapier, A. Drees, K. A. Drees, R. du Rietz, A. Durum, D. Dutta, Y. V. Efremenko, K. El Chenawi, A. Enokizono, H. En'yo, S. Esumi, L. Ewell, D. E. Fields, F. Fleuret, S. L. Fokin, B. D. Fox, Z. Fraenkel, J. E. Frantz, A. Franz, A. D. Frawley, S. Y. Fung, S. Garpman, T. K. Ghosh, A. Glenn, G. Gogiberidze, M. Gonin, J. Gosset, Y. Goto, R. Granier de Cassagnac, N. Grau, S. V. Greene, M. Grosse Perdekamp, W. Guryn, H. A. Gustafsson, T. Hachiya, J. S. Haggerty, H. Hamagaki, A. G. Hansen, E. P. Hartouni, M. Harvey, R. Hayano, N. Hayashi, X. He, M. Heffner, T. K. Hemmick, J. M. Heuser, M. Hibino, J. C. Hill, W. Holzmann, K. Homma, B. Hong, A. Hoover, T. Ichihara, V. V. Ikonnikov, K. Imai, D. Isenhower, M. Ishihara, M. Issah, A. Isupov, B. V. Jacak, W. Y. Jang, Y. Jeong, J. Jia, O. Jinnouchi, B. M. Johnson, S. C. Johnson, K. S. Joo, D. Jouan, S. Kametani, N. Kamihara, J. H. Kang, S. S. Kapoor, K. Katou, S. Kelly, B. Khachaturov, A. Khanzadeev, J. Kikuchi, D. H. Kim, D. J. Kim, D. W. Kim, E. Kim, G. B. Kim, H. J. Kim, E. Kistenev, A. Kiyomichi, K. Kiyoyama, C. Klein-Boesing, H. Kobayashi, L. Kochenda, V. Kochetkov, D. Koehler, T. Kohama, M. Kopytine, D. Kotchetkov, A. Kozlov, P. J. Kroon, C. H. Kuberg, K. Kurita, Y. Kuroki, M. J. Kweon, Y. Kwon, G. S. Kyle, R. Lacey, V. Ladygin, J. G. Lajoie, A. Lebedev, S. Leckey, D. M. Lee, S. Lee, M. J. Leitch, X. H. Li, H. Lim, A. Litvinenko, M. X. Liu, Y. Liu, C. F. Maguire, Y. I. Makdisi, A. Malakhov, V. I. Manko, Y. Mao, G. Martinez, M. D. Marx, H. Masui, F. Matathias, T. Matsumoto, P. L. McGaughey, E. Melnikov, F. Messer, Y. Miake, J. Milan, T. E. Miller, A. Milov, S. Mioduszewski, R. E. Mischke, G. C. Mishra, J. T. Mitchell, A. K. Mohanty, D. P. Morrison, J. M. Moss, F. Mühlbacher, D. Mukhopadhyay, M. Muniruzzaman, J. Murata, S. Nagamiya, J. L. Nagle, T. Nakamura, B. K. Nandi, M. Nara, J. Newby, P. Nilsson, A. S. Nyanin, J. Nystrand, E. O'Brien, C. A. Ogilvie, H. Ohnishi, I. D. Ojha, K. Okada, M. Ono, V. Onuchin, A. Oskarsson, I. Otterlund, K. Oyama, K. Ozawa, D. Pal, A. P.T. Palounek, V. Pantuev, V. Papavassiliou, J. Park, A. Parmar, S. F. Pate, T. Peitzmann, J. C. Peng, V. Peresedov, C. Pinkenburg, R. P. Pisani, F. Plasil, M. L. Purschke, A. K. Purwar, J. Rak, I. Ravinovich, K. F. Read, M. Reuter, K. Reygers, V. Riabov, Y. Riabov, G. Roche, A. Romana, M. Rosati, P. Rosnet, S. S. Ryu, M. E. Sadler, N. Saito, T. Sakaguchi, M. Sakai, S. Sakai, V. Samsonov, L. Sanfratello, R. Santo, H. D. Sato, S. Sato, S. Sawada, Y. Schutz, V. Semenov, R. Seto, M. R. Shaw, T. K. Shea, T. A. Shibata, K. Shigaki, T. Shiina, C. L. Silva, D. Silvermyr, K. S. Sim, C. P. Singh, V. Singh, M. Sivertz, A. Soldatov, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, F. Staley, P. W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S. P. Stoll, T. Sugitate, J. P. Sullivan, E. M. Takagui, A. Taketani, M. Tamai, K. H. Tanaka, Y. Tanaka, K. Tanida, M. J. Tannenbaum, P. Tarján, J. D. Tepe, T. L. Thomas, J. Tojo, H. Torii, R. S. Towell, I. Tserruya, H. Tsuruoka, S. K. Tuli, H. Tydesjö, N. Tyurin, H. W. van Hecke, J. Velkovska, M. Velkovsky, V. Veszprémi, L. Villatte, A. A. Vinogradov, M. A. Volkov, E. Vznuzdaev, X. R. Wang, Y. Watanabe, S. N. White, F. K. Wohn, C. L. Woody, W. Xie, Y. Yang, A. Yanovich, S. Yokkaichi, G. R. Young, I. E. Yushmanov, W. A. Zajc, C. Zhang, S. Zhou, S. J. Zhou, L. Zolin

      Physical Review C - Nuclear Physics72 ( 2 )   2005

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Physical Society  

      The transverse momentum dependence of the azimuthal anisotropy parameter v2, the second harmonic of the azimuthal distribution, for electrons at midrapidity (|η|&lt
      0.35) has been measured with the PHENIX detector in Au+Au collisions at sNN=200 GeV. The measurement was made with respect to the reaction plane defined at high rapidities (|η|=3.1-3.9). From the result we have measured the v2 of electrons from heavy flavor decay after subtraction of the v2 of electrons from other sources such as photon conversions and Dalitz decay from light neutral mesons. We observe a nonzero single electron v2 with a 90% confidence level in the intermediate-pT region. The precision of the present data set does not permit us to conclude definitively that heavy quarks exhibit thermalization with the transverse flow of the bulk matter. © 2005 The American Physical Society.

      DOI: 10.1103/PhysRevC.72.024901

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    • Jet structure of baryon excess in Au+Au collisions at sNN=200GeV

      S. S. Adler, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, A. Al-Jamel, J. Alexander, R. Amirikas, K. Aoki, L. Aphecetche, R. Armendariz, S. H. Aronson, R. Averbeck, T. C. Awes, R. Azmoun, V. Babintsev, A. Baldisseri, K. N. Barish, P. D. Barnes, B. Bassalleck, S. Bathe, S. Batsouli, V. Baublis, F. Bauer, A. Bazilevsky, S. Belikov, Y. Berdnikov, S. Bhagavatula, M. T. Bjorndal, J. G. Boissevain, H. Borel, S. Borenstein, M. L. Brooks, D. S. Brown, N. Bruner, D. Bucher, H. Buesching, V. Bumazhnov, G. Bunce, J. M. Burward-Hoy, S. Butsyk, X. Camard, J. S. Chai, P. Chand, W. C. Chang, S. Chernichenko, C. Y. Chi, J. Chiba, M. Chiu, I. J. Choi, J. Choi, R. K. Choudhury, T. Chujo, V. Cianciolo, Y. Cobigo, B. A. Cole, M. P. Comets, P. Constantin, M. Csanád, T. Csörgo, J. P. Cussonneau, D. d'Enterria, K. Das, G. David, F. Deák, H. Delagrange, A. Denisov, A. Deshpande, E. J. Desmond, A. Devismes, O. Dietzsch, J. L. Drachenberg, O. Drapier, A. Drees, K. A. Drees, R. du Rietz, A. Durum, D. Dutta, V. Dzhordzhadze, Y. V. Efremenko, K. El Chenawi, A. Enokizono, H. En'yo, B. Espagnon, S. Esumi, L. Ewell, D. E. Fields, C. Finck, F. Fleuret, S. L. Fokin, B. D. Fox, Z. Fraenkel, J. E. Frantz, A. Franz, A. D. Frawley, Y. Fukao, S. Y. Fung, S. Gadrat, S. Garpman, M. Germain, T. K. Ghosh, A. Glenn, G. Gogiberidze, M. Gonin, J. Gosset, Y. Goto, R. Granier de Cassagnac, N. Grau, S. V. Greene, M. Grosse Perdekamp, W. Guryn, H. A. Gustafsson, T. Hachiya, J. S. Haggerty, H. Hamagaki, A. G. Hansen, E. P. Hartouni, M. Harvey, K. Hasuko, R. Hayano, N. Hayashi, X. He, M. Heffner, T. K. Hemmick, J. M. Heuser, M. Hibino, P. Hidas, H. Hiejima, J. C. Hill, R. Hobbs, W. Holzmann, K. Homma, B. Hong, A. Hoover, T. Horaguchi, T. Ichihara, V. V. Ikonnikov, K. Imai, M. Inaba, M. Inuzuka, D. Isenhower, L. Isenhower, M. Ishihara, M. Issah, A. Isupov, B. V. Jacak, W. Y. Jang, Y. Jeong, J. Jia, O. Jinnouchi, B. M. Johnson, S. C. Johnson, K. S. Joo, D. Jouan, F. Kajihara, S. Kametani, N. Kamihara, M. Kaneta, J. H. Kang, S. S. Kapoor, K. Katou, T. Kawabata, A. Kazantsev, S. Kelly, B. Khachaturov, A. Khanzadeev, J. Kikuchi, D. H. Kim, D. J. Kim, D. W. Kim, E. Kim, G. B. Kim, H. J. Kim, E. Kinney, W. W. Kinnison, A. Kiss, E. Kistenev, A. Kiyomichi, K. Kiyoyama, C. Klein-Boesing, H. Kobayashi, L. Kochenda, V. Kochetkov, D. Koehler, T. Kohama, R. Kohara, B. Komkov, M. Konno, M. Kopytine, D. Kotchetkov, A. Kozlov, P. J. Kroon, C. H. Kuberg, G. J. Kunde, K. Kurita, Y. Kuroki, M. J. Kweon, Y. Kwon, G. S. Kyle, R. Lacey, V. Ladygin, J. G. Lajoie, Y. Le Bornec, A. Lebedev, S. Leckey, D. M. Lee, S. Lee, M. J. Leitch, M. A.L. Leite, X. H. Li, H. Lim, A. Litvinenko, M. X. Liu, Y. Liu, C. F. Maguire, Y. I. Makdisi, A. Malakhov, V. I. Manko, Y. Mao, G. Martinez, M. D. Marx, H. Masui, F. Matathias, T. Matsumoto, M. C. McCain, P. L. McGaughey, E. Melnikov, F. Messer, Y. Miake, J. Milan, T. E. Miller, A. Milov, S. Mioduszewski, R. E. Mischke, G. C. Mishra, J. T. Mitchell, A. K. Mohanty, D. P. Morrison, J. M. Moss, F. Mühlbacher, D. Mukhopadhyay, M. Muniruzzaman, J. Murata, S. Nagamiya, J. L. Nagle, T. Nakamura, B. K. Nandi, M. Nara, J. Newby, P. Nilsson, A. S. Nyanin, J. Nystrand, E. O'Brien, C. A. Ogilvie, H. Ohnishi, I. D. Ojha, H. Okada, K. Okada, M. Ono, V. Onuchin, A. Oskarsson, I. Otterlund, K. Oyama, K. Ozawa, D. Pal, A. P.T. Palounek, V. Pantuev, V. S. Pantuev, V. Papavassiliou, J. Park, W. J. Park, A. Parmar, S. F. Pate, H. Pei, T. Peitzmann, V. Penev, J. C. Peng, H. Pereira, V. Peresedov, A. Pierson, C. Pinkenburg, R. P. Pisani, F. Plasil, M. L. Purschke, A. K. Purwar, J. Qualls, J. Rak, I. Ravinovich, K. F. Read, M. Reuter, K. Reygers, V. Riabov, Y. Riabov, G. Roche, A. Romana, M. Rosati, S. Rosendahl, P. Rosnet, V. L. Rykov, S. S. Ryu, M. E. Sadler, N. Saito, T. Sakaguchi, M. Sakai, S. Sakai, V. Samsonov, L. Sanfratello, R. Santo, H. D. Sato, S. Sato, S. Sawada, Y. Schutz, V. Semenov, R. Seto, M. R. Shaw, T. K. Shea, I. Shein, T. A. Shibata, K. Shigaki, T. Shiina, M. Shimomura, A. Sickles, C. L. Silva, D. Silvermyr, K. S. Sim, J. Simon-Gillo, C. P. Singh, V. Singh, M. Sivertz, A. Soldatov, R. A. Soltz, W. E. Sondheim, S. Sorensen, S. P. Sorensen, I. V. Sourikova, F. Staley, P. W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S. P. Stoll, T. Sugitate, J. P. Sullivan, S. Takagi, E. M. Takagui, A. Taketani, M. Tamai, K. H. Tanaka, Y. Tanaka, K. Tanida, M. J. Tannenbaum, A. Taranenko, P. Tarján, J. D. Tepe, T. L. Thomas, M. Togawa, J. Tojo, H. Torii, R. S. Towell, V. N. Tram, I. Tserruya, Y. Tsuchimoto, H. Tsuruoka, S. K. Tuli, H. Tydesjö, N. Tyurin, T. J. Uam, H. W. van Hecke, J. Velkovska, M. Velkovsky, V. Veszprémi, L. Villatte, A. A. Vinogradov, M. A. Volkov, E. Vznuzdaev, X. R. Wang, Y. Watanabe, S. N. White, N. Willis, F. K. Wohn, C. L. Woody, W. Xie, Y. Yang, A. Yanovich, S. Yokkaichi, G. R. Young, I. E. Yushmanov, W. A. Zajc, C. Zhang, S. Zhou, S. J. Zhou, J. Zimányi, L. Zolin, X. Zong

      Physical Review C - Nuclear Physics71 ( 5 ) 6   2005

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Physical Society  

      Two particle correlations between identified meson and baryon trigger particles with 2.5&lt
      pT&lt
      4.0GeV/c and lower pT charged hadrons have been measured at midrapidity by the PHENIX experiment at RHIC in p+p,d+Au, and Au+Au collisions at sNN=200GeV. In noncentral Au+Au collisions, the probability of finding a hadron near in azimuthal angle to the trigger particles is almost identical for mesons and baryons and significantly higher than in p+p collisions. The associated yields for trigger baryons decrease in the most central collisions, consistent with some baryon production by thermal recombination in addition to hard scattering. © 2005 The American Physical Society.

      DOI: 10.1103/PhysRevC.71.051902

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    • Double helicity asymmetry in inclusive midrapidity pi(0) production for polarized p+p collisions at root s=200 GeV

      SS Adler, S Afanasiev, C Aidala, NN Ajitanand, Y Akiba, A Al-Jamel, J Alexander, K Aoki, L Aphecetche, R Armendariz, SH Aronson, R Averbeck, TC Awes, Babintsev, V, A Baldisseri, KN Barish, PD Barnes, B Bassalleck, S Bathe, S Batsouli, Baublis, V, F Bauer, A Bazilevsky, S Belikov, MT Bjorndal, JG Boissevain, H Borel, ML Brooks, DS Brown, N Bruner, D Bucher, H Buesching, Bumazhnov, V, G Bunce, JM Burward-Hoy, S Butsyk, Camard, X, P Chand, WC Chang, S Chernichenko, CY Chi, J Chiba, M Chiu, IJ Choi, RK Choudhury, T Chujo, Cianciolo, V, Y Cobigo, BA Cole, MP Comets, P Constantin, M Csanad, T Csorgo, JP Cussonneau, D d'Enterria, K Das, G David, F Deak, H Delagrange, A Denisov, A Deshpande, EJ Desmond, A Devismes, O Dietzsch, JL Drachenberg, O Drapier, A Drees, A Durum, D Dutta, Dzhordzhadze, V, YV Efremenko, H En'yo, B Espagnon, S Esumi, DE Fields, C Finck, F Fleuret, SL Fokin, BD Fox, Z Fraenkel, JE Frantz, A Franz, AD Frawley, Y Fukao, SY Fung, S Gadrat, M Germain, A Glenn, M Gonin, J Gosset, Y Goto, RG de Cassagnac, N Grau, SV Greene, MG Perdekamp, HA Gustafsson, T Hachiya, JS Haggerty, H Hamagaki, AG Hansen, EP Hartouni, M Harvey, K Hasuko, R Hayano, He, X, M Heffner, TK Hemmick, JM Heuser, P Hidas, H Hiejima, JC Hill, R Hobbs, W Holzmann, K Homma, B Hong, A Hoover, T Horaguchi, T Ichihara, VV Ikonnikov, K Imai, M Inaba, M Inuzuka, D Isenhower, L Isenhower, M Ishihara, M Issah, A Isupov, BV Jacak, J Jia, O Jinnouchi, BM Johnson, SC Johnson, KS Joo, D Jouan, F Kajihara, S Kametani, N Kamihara, M Kaneta, JH Kang, K Katou, T Kawabata, A Kazantsev, S Kelly, B Khachaturov, A Khanzadeev, J Kikuchi, DJ Kim, E Kim, GB Kim, HJ Kim, E Kinney, A Kiss, E Kistenev, A Kiyomichi, C Klein-Boesing, H Kobayashi, Kochetkov, V, R Kohara, B Komkov, M Konno, D Kotchetkov, A Kozlov, PJ Kroon, CH Kuberg, GJ Kunde, K Kurita, MJ Kweon, Y Kwon, GS Kyle, R Lacey, JG Lajoie, Y Le Bornec, A Lebedev, S Leckey, DM Lee, MJ Leitch, MAL Leite, Li, X, XH Li, H Lim, A Litvinenko, MX Liu, CF Maguire, YI Makdisi, A Malakhov, Manko, VI, Y Mao, G Martinez, H Masui, F Matathias, T Matsumoto, MC McCain, PL McGaughey, Y Miake, TE Miller, A Milov, S Mioduszewski, GC Mishra, JT Mitchell, AK Mohanty, DP Morrison, JM Moss, D Mukhopadhyay, M Muniruzzaman, S Nagamiya, JL Nagle, T Nakamura, J Newby, AS Nyanin, J Nystrand, E O'Brien, CA Ogilvie, H Ohnishi, ID Ojha, H Okada, K Okada, A Oskarsson, Otterlund, I, K Oyama, K Ozawa, D Pal, APT Palounek, Pantuev, V, Papavassiliou, V, J Park, WJ Park, SF Pate, H Pei, Penev, V, JC Peng, H Pereira, Peresedov, V, A Pierson, C Pinkenburg, RP Pisani, ML Purschke, AK Purwar, J Qualls, J Rak, Ravinovich, I, KF Read, M Reuter, K Reygers, Riabov, V, Y Riabov, G Roche, A Romana, M Rosati, S Rosendahl, P Rosnet, VL Rykov, SS Ryu, N Saito, T Sakaguchi, S Sakai, Samsonov, V, L Sanfratello, R Santo, HD Sato, S Sato, S Sawada, Y Schutz, Semenov, V, R Seto, TK Shea, Shein, I, TA Shibata, K Shigaki, M Shimomura, A Sickles, CL Silva, D Silvermyr, KS Sim, A Soldatov, RA Soltz, WE Sondheim, S Sorensen, Sourikova, IV, F Staley, PW Stankus, E Stenlund, M Stepanov, A Ster, SP Stoll, T Sugitate, JP Sullivan, S Takagi, EM Takagui, A Taketani, KH Tanaka, Y Tanaka, K Tanida, MJ Tannenbaum, A Taranenko, P Tarjan, TL Thomas, M Togawa, J Tojo, H Torii, RS Towell, VN Tram, Tserruya, I, Y Tsuchimoto, H Tydesjo, N Tyurin, TJ Uam, HW van Hecke, J Velkovska, M Velkovsky, Veszpremi, V, AA Vinogradov, MA Volkov, E Vznuzdaev, XR Wang, Y Watanabe, SN White, N Willis, FK Wohn, CL Woody, W Xie, A Yanovich, S Yokkaichi, GR Young, IE Yushmanov, WA Zajc, O Zaudtke, C Zhang, S Zhou, J Zimanyi, L Zolin, Zong, X

      PHYSICAL REVIEW LETTERS93 ( 20 ) 202002   11 2004

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER PHYSICAL SOC  

      We present a measurement of the double longitudinal spin asymmetry in inclusive pi(0) production in polarized proton-proton collisions at roots=200 GeV. The data were taken at the Relativistic Heavy Ion Collider with average beam polarizations of 0.27. The measurements are the first in a program to study the longitudinal spin structure of the proton, using strongly interacting probes, at collider energies. The asymmetry is presented for transverse momenta 1-5 GeV/c at midrapidity, where next-to-leading-order perturbative quantum chromodynamic (NLO pQCD) calculations well describe the unpolarized cross section. The observed asymmetry is small and is compared to a NLO pQCD calculation with a range of polarized gluon distributions.

      DOI: 10.1103/PhysRevLett.93.202002

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    • SATURATION OF AZIMUTHAL ANISOTROPY IN AU+ AU COLLISIONS AT S(NN)**(1/2) 62-GEV TO 200-GEV.

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      PHENIX Collaboration Phys.Rev.Lett.   7   11 2004

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    • Bose-einstein correlations of charged pion pairs in Au + Au collisions at √sNN = 200 GeV

      S. S. Adler, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, J. Alexander, R. Amirikas, L. Aphecetche, S. H. Aronson, R. Averbeck, T. C. Awes, R. Azmoun, V. Babintsev, A. Baldisseri, K. N. Barish, P. D. Barnes, B. Bassalleck, S. Bathe, S. Batsouli, V. Baublis, A. Bazilevsky, S. Belikov, Y. Berdnikov, S. Bhagavatula, J. G. Boissevain, H. Borel, S. Borenstein, M. L. Brooks, D. S. Brown, N. Bruner, D. Bucher, H. Buesching, V. Bumazhnov, G. Bunce, J. M. Burward-Hoy, S. Butsyk, X. Camard, J. S. Chai, P. Chand, W. C. Chang, S. Chernichenko, C. Y. Chi, J. Chiba, M. Chiu, I. J. Choi, J. Choi, R. K. Choudhury, T. Chujo, V. Cianciolo, Y. Cobigo, B. A. Cole, P. Constantin, D. G. d'Enterria, G. David, H. Delagrange, A. Denisov, A. Deshpande, E. J. Desmond, O. Dietzsch, O. Drapier, A. Drees, R. du Rietz, A. Durum, D. Dutta, Y. V. Efremenko, K. El Chenawi, A. Enokizono, H. En'yo, S. Esumi, L. Ewell, D. E. Fields, F. Fleuret, S. L. Fokin, B. D. Fox, Z. Fraenkel, J. E. Frantz, A. Franz, A. D. Frawley, S. Y. Fung, S. Garpman, T. K. Ghosh, A. Glenn, G. Gogiberidze, M. Gonin, J. Gosset, Y. Goto, R. Granier de Cassagnac, N. Grau, S. V. Greene, M. Grosse Perdekamp, W. Guryn, H. Å Gustafsson, T. Hachiya, J. S. Haggerty, H. Hamagaki, A. G. Hansen, E. P. Hartouni, M. Harvey, R. Hayano, X. He, M. Heffner, T. K. Hemmick, J. M. Heuser, M. Hibino, J. C. Hill, W. Holzmann, K. Homma, B. Hong, A. Hoover, T. Ichihara, V. V. Ikonnikov, K. Imai, D. Isenhower, M. Ishihara, M. Issah, A. Isupov, B. V. Jacak, W. Y. Jang, Y. Jeong, J. Jia, O. Jinnouchi, B. M. Johnson, S. C. Johnson, K. S. Joo, D. Jouan, S. Kametani, N. Kamihara, J. H. Kang, S. S. Kapoor, K. Katou, S. Kelly, B. Khachaturov, A. Khanzadeev, J. Kikuchi, D. H. Kim, D. J. Kim, D. W. Kim, E. Kim, G. B. Kim, H. J. Kim, E. Kistenev, A. Kiyomichi, K. Kiyoyama, C. Klein-Boesing, H. Kobayashi, L. Kochenda, V. Kochetkov, D. Koehler, T. Kohama, M. Kopytine, D. Kotchetkov, A. Kozlov, P. J. Kroon, C. H. Kuberg, K. Kurita, Y. Kuroki, M. J. Kweon, Y. Kwon, G. S. Kyle, R. Lacey, V. Ladygin, J. G. Lajoie, A. Lebedev, S. Leckey, D. M. Lee, S. Lee, M. J. Leitch, X. H. Li, H. Lim, A. Litvinenko, M. X. Liu, Y. Liu, C. F. Maguire, Y. I. Makdisi, A. Malakhov, V. I. Manko, Y. Mao, G. Martinez, M. D. Marx, H. Masui, F. Matathias, T. Matsumoto, P. L. McGaughey, E. Melnikov, F. Messer, Y. Miake, J. Milan, T. E. Miller, A. Milov, S. Mioduszewski, R. E. Mischke, G. C. Mishra, J. T. Mitchell, A. K. Mohanty, D. P. Morrison, J. M. Moss, F. Mühlbacher, D. Mukhopadhyay, M. Muniruzzaman, J. Murata, S. Nagamiya, J. L. Nagle, T. Nakamura, B. K. Nandi, M. Nara, J. Newby, P. Nilsson, A. S. Nyanin, J. Nystrand, E. O'Brien, C. A. Ogilvie, H. Ohnishi, I. D. Ojha, K. Okada, M. Ono, V. Onuchin, A. Oskarsson, I. Otterlund, K. Oyama, K. Ozawa, D. Pal, A. P.T. Palounek, V. S. Pantuev, V. Papavassiliou, J. Park, A. Parmar, S. F. Pate, T. Peitzmann, J. C. Peng, V. Peresedov, C. Pinkenburg, R. P. Pisani, F. Plasil, M. L. Purschke, A. K. Purwar, J. Rak, I. Ravinovich, K. F. Read, M. Reuter, K. Reygers, V. Riabov, Y. Riabov, G. Roche, A. Romana, M. Rosati, P. Rosnet, S. S. Ryu, M. E. Sadler, N. Saito, T. Sakaguchi, M. Sakai, S. Sakai, V. Samsonov, L. Sanfratello, R. Santo, H. D. Sato, S. Sato, S. Sawada, Y. Schutz, V. Semenov, R. Seto, M. R. Shaw, T. K. Shea, T. A. Shibata, K. Shigaki, T. Shiina, C. L. Silva, D. Silvermyr, K. S. Sim, C. P. Singh, V. Singh, M. Sivertz, A. Soldatov, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, F. Staley, P. W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S. P. Stoll, T. Sugitate, J. P. Sullivan, E. M. Takagui, A. Taketani, M. Tamai, K. H. Tanaka, Y. Tanaka, K. Tanida, M. J. Tannenbaum, P. Tarján, J. D. Tepe, T. L. Thomas, J. Tojo, H. Torii, R. S. Towell, I. Tserruya, H. Tsuruoka, S. K. Tuli, H. Tydesjö, N. Tyurin, H. W. van Hecke, J. Velkovska, M. Velkovsky, L. Villatte, A. A. Vinogradov, M. A. Volkov, E. Vznuzdaev, X. R. Wang, Y. Watanabe, S. N. White, F. K. Wohn, C. L. Woody, W. Xie, Y. Yang, A. Yanovich, S. Yokkaichi, G. R. Young, I. E. Yushmanov, W. A. Zajc, C. Zhang, S. Zhou, S. J. Zhou, L. Zolin

      Physical Review Letters93 ( 15 ) 1 - 152302   8 10 2004

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      The use of PHENIX experiment at midrapidity in Au + Au collision at √sNN = 200 GeV for calculating Bose-Einstein correlation of identical charged ion pairs was discussed. It was found that the Bertsch-Partt radius parameters were determined as a function of the transverse momentum of the pair and as function of the collision. It was also observed that the value of Rout/Rside, as function of kT decrease from ∼1.1 to ∼ 0.8 over the range of kT. The results show that the measurements of the transverse momentum dependence of the HBT radii.

      DOI: 10.1103/PhysRevLett.93.152302

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    • PRODUCTION OF PHI MESONS AT MID-RAPIDITY IN S(NN)**(1/2) = 200-GEV AU+AU COLLISIONS AT RHIC.

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      PHENIX Collaboration Phys.Rev.C   26   10 2004

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    • CENTRALITY DEPENDENCE OF CHARM PRODUCTION FROM SINGLE ELECTRONS MEASUREMENT IN AU+ AU COLLISIONS AT S(NN)**(1/2) = 200-GEV.

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      PHENIX Collaboration Phys.Rev.Lett.   6   9 2004

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    • 29pSG-10 B(E2) measurement of the proton-rich ^<46>Cr, ^<50>Fe, and ^<54>Ni nucler studied by Coulomb excitation (II)

      Yamada,K, Motobayashi,T, Aoi,N, Baba,H, Demichi,K, Elekes,Z, Gibelm,J, Gomi,T, Hasegawa,H, Imai,N, Iwasaki,H, Kanno,S, Kubo,T, Kurita,K, Matsuyama,Y U, Michimasa,S, Minemura,T, Notani,M, Ohnishi,T, Ong,H J, Ota,S, Ozawa,A, Saito,A, Sakurai,H, Shimoura,S, Takeshita,E, Takeuchi,S, Tamaki,M, Togano,Y, Yanagisawa,Y, Yoneda,K, Tanihata,I

      Meeting abstracts of the Physical Society of Japan59 ( 2 ) 42   8 2004

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      Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Physical Society of Japan (JPS)  

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    • Measurement of nonrandom event-by-event fluctuations of average transverse momentum in root S-NN=200 GeV Au+Au and p+p collisions

      SS Adler, S Afanasiev, C Aidala, NN Ajitanand, Y Akiba, J Alexander, R Amirikas, L Aphecetche, SH Aronson, R Averbeck, TC Awes, R Azmoun, Babintsev, V, A Baldisseri, KN Barish, PD Barnes, B Bassalleck, S Bathe, S Batsouli, Baublis, V, A Bazilevsky, S Belikov, Y Berdnikov, S Bhagavatula, JG Boissevain, H Borel, S Borenstein, ML Brooks, DS Brown, N Bruner, D Bucher, H Buesching, Bumazhnov, V, G Bunce, JM Burward-Hoy, S Butsyk, Camard, X, JS Chai, P Chand, WC Chang, S Chernichenko, CY Chi, J Chiba, M Chiu, IJ Choi, J Choi, RK Choudhury, T Chujo, Cianciolo, V, Y Cobigo, BA Cole, P Constantin, DG d'Enterria, G David, H Delagrange, A Denisov, A Deshpande, EJ Desmond, O Dietzsch, O Drapier, A Drees, R du Rietz, A Durum, D Dutta, YV Efremenko, K El Chenawi, A Enokizono, H En'yo, S Esumi, L Ewell, DE Fields, F Fleuret, SL Fokin, BD Fox, Z Fraenkel, JE Frantz, A Franz, AD Frawley, SY Fung, S Garpman, TK Ghosh, A Glenn, G Gogiberidze, M Gonin, J Gosset, Y Goto, RG de Cassagnac, N Grau, SV Greene, MG Perdekamp, W Guryn, HA Gustafsson, T Hachiya, JS Haggerty, H Hamagaki, AG Hansen, EP Hartouni, M Harvey, R Hayano, He, X, M Heffner, TK Hemmick, JM Heuser, M Hibino, JC Hill, W Holzmann, K Homma, B Hong, A Hoover, T Ichihara, VV Ikonnikov, K Imai, D Isenhower, M Ishihara, M Issah, A Isupov, BV Jacak, WY Jang, Y Jeong, J Jia, O Jinnouchi, BM Johnson, SC Johnson, KS Joo, D Jouan, S Kametani, N Kamihara, JH Kang, SS Kapoor, K Katou, S Kelly, B Khachaturov, A Khanzadeev, J Kikuchi, DH Kim, DJ Kim, DW Kim, E Kim, GB Kim, HJ Kim, E Kistenev, A Kiyomichi, K Kiyoyama, C Klein-Boesing, H Kobayashi, L Kochenda, Kochetkov, V, D Koehler, T Kohama, M Kopytine, D Kotchetkov, A Kozlov, PJ Kroon, CH Kuberg, K Kurita, Y Kuroki, MJ Kweon, Y Kwon, GS Kyle, R Lacey, Ladygin, V, JG Lajoie, A Lebedev, S Leckey, DM Lee, S Lee, MJ Leitch, XH Li, H Lim, A Litvinenko, MX Liu, Y Liu, CF Maguire, YI Makdisi, A Malakhov, Manko, VI, Y Mao, G Martinez, MD Marx, H Masui, F Matathias, T Matsumoto, PL McGaughey, E Melnikov, F Messer, Y Miake, J Milan, TE Miller, A Milov, S Mioduszewski, RE Mischke, GC Mishra, JT Mitchell, AK Mohanty, DP Morrison, JM Moss, F Muhlbacher, D Mukhopadhyay, M Muniruzzaman, J Murata, S Nagamiya, JL Nagle, T Nakamura, BK Nandi, M Nara, J Newby, P Nilsson, AS Nyanin, J Nystrand, E O'Brien, CA Ogilvie, H Ohnishi, ID Ojha, K Okada, M Ono, Onuchin, V, A Oskarsson, Otterlund, I, K Oyama, K Ozawa, D Pal, APT Palounek, VS Pantuev, Papavassiliou, V, J Park, A Parmar, SF Pate, T Peitzmann, JC Peng, Peresedov, V, C Pinkenburg, RP Pisani, F Plasil, ML Purschke, AK Purwar, J Rak, Ravinovich, I, KF Read, M Reuter, K Reygers, Riabov, V, Y Riabov, G Roche, A Romana, M Rosati, P Rosnet, SS Ryu, ME Sadler, N Saito, T Sakaguchi, M Sakai, S Sakai, Samsonov, V, L Sanfratello, R Santo, HD Sato, S Sato, S Sawada, Y Schutz, Semenov, V, R Seto, MR Shaw, TK Shea, TA Shibata, K Shigaki, T Shiina, CL Silva, D Silvermyr, KS Sim, CP Singh, Singh, V, M Sivertz, A Soldatov, RA Soltz, WE Sondheim, SP Sorensen, Sourikova, IV, F Staley, PW Stankus, E Stenlund, M Stepanov, A Ster, SP Stoll, T Sugitate, JP Sullivan, EM Takagui, A Taketani, M Tamai, KH Tanaka, Y Tanaka, K Tanida, MJ Tannenbaum, P Tarjan, JD Tepe, TL Thomas, J Tojo, H Torii, RS Towell, Tserruya, I, H Tsuruoka, SK Tuli, H Tydesjo, N Tyurin, HW van Hecke, J Velkovska, M Velkovsky, L Villatte, AA Vinogradov, MA Volkov, E Vznuzdaev, XR Wang, Y Watanabe, SN White, FK Wohn, CL Woody, W Xie, Y Yang, A Yanovich, S Yokkaichi, GR Young, IE Yushmanov, WA Zajc, C Zhang, S Zhou, SJ Zhou, L Zolin

      PHYSICAL REVIEW LETTERS93 ( 9 ) 92301   8 2004

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMERICAN PHYSICAL SOC  

      Event-by-event fluctuations of the average transverse momentum of produced particles near midrapidity have been measured by the PHENIX Collaboration in roots(NN)=200 GeV Au+Au, and p+p collisions at the Relativistic Heavy Ion Collider. The fluctuations are observed to be in excess of the expectation for statistically independent particle emission for all centralities. The excess fluctuations exhibit a dependence on both the centrality of the collision and on the p(T) range over which the average is calculated. Both the centrality and p(T) dependence can be well reproduced by a simulation of random particle production with the addition of contributions from hard-scattering processes.

      DOI: 10.1103/PhysRevLett.93.092301

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    • DEUTERON AND ANTIDEUTERON PRODUCTION IN AU+ AU COLLISIONS AT S(NN)**(1/2) = 200-GEV.

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      PHENIX Collaboration Phys.Rev.Lett.   6   6 2004

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    • High-pT charged hadron suppression in Au+Au collisions at √SNN=200 GeV

      S. S. Adler, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, J. Alexander, R. Amirikas, L. Aphecetche, S. H. Aronson, R. Averbeck, T. C. Awes, R. Azmoun, V. Babintsev, A. Baldisseri, K. N. Barish, P. D. Barnes, B. Bassalleck, S. Bathe, S. Batsouli, V. Baublis, A. Bazilevsky, S. Belikov, Y. Berdnikov, S. Bhagavatula, J. G. Boissevain, H. Borel, S. Borenstein, M. L. Brooks, D. S. Brown, N. Bruner, D. Bucher, H. Buesching, V. Bumazhnov, G. Bunce, J. M. Burward-Hoy, S. Butsyk, X. Camard, J. S. Chai, P. Chand, W. C. Chang, S. Chernichenko, C. Y. Chi, J. Chiba, M. Chiu, I. J. Choi, J. Choi, R. K. Choudhury, T. Chujo, V. Cianciolo, Y. Cobigo, B. A. Cole, P. Constantin, D. G. d'Enterria, G. David, H. Delagrange, A. Denisov, A. Deshpande, E. J. Desmond, O. Dietzsch, O. Drapier, A. Drees, R. du Rietz, A. Durum, D. Dutta, Y. V. Efremenko, K. El Chenawi, A. Enokizono, H. En'yo, S. Esumi, L. Ewell, D. E. Fields, F. Fleuret, S. L. Fokin, B. D. Fox, Z. Fraenkel, J. E. Frantz, A. Franz, A. D. Frawley, S. Y. Fung, S. Garpman, T. K. Ghosh, A. Glenn, G. Gogiberidze, M. Gonin, J. Gosset, Y. Goto, R. Granier de Cassagnac, N. Grau, S. V. Greene, M. Grosse Perdekamp, W. Guryn, H. A. Gustafsson, T. Hachiya, J. S. Haggerty, H. Hamagaki, A. G. Hansen, E. P. Hartouni, M. Harvey, R. Hayano, X. He, M. Heffner, T. K. Hemmick, J. M. Heuser, M. Hibino, J. C. Hill, W. Holzmann, K. Homma, B. Hong, A. Hoover, T. Ichihara, V. V. Ikonnikov, K. Imai, D. Isenhower, M. Ishihara, M. Issah, A. Isupov, B. V. Jacak, W. Y. Jang, Y. Jeong, J. Jia, O. Jinnouchi, B. M. Johnson, S. C. Johnson, K. S. Joo, D. Jouan, S. Kametani, N. Kamihara, J. H. Kang, S. S. Kapoor, K. Katou, S. Kelly, B. Khachaturov, A. Khanzadeev, J. Kikuchi, D. H. Kim, D. J. Kim, D. W. Kim, E. Kim, G. B. Kim, H. J. Kim, E. Kistenev, A. Kiyomichi, K. Kiyoyama, C. Klein-Boesing, H. Kobayashi, L. Kochenda, V. Kochetkov, D. Koehler, T. Kohama, M. Kopytine, D. Kotchetkov, A. Kozlov, P. J. Kroon, C. H. Kuberg, K. Kurita, Y. Kuroki, M. J. Kweon, Y. Kwon, G. S. Kyle, R. Lacey, V. Ladygin, J. G. Lajoie, A. Lebedev, S. Leckey, D. M. Lee, S. Lee, M. J. Leitch, X. H. Li, H. Lim, A. Litvinenko, M. X. Liu, Y. Liu, C. F. Maguire, Y. I. Makdisi, A. Malakhov, V. I. Manko, Y. Mao, G. Martinez, M. D. Marx, H. Masui, F. Matathias, T. Matsumoto, P. L. McGaughey, E. Melnikov, F. Messer, Y. Miake, J. Milan, T. E. Miller, A. Milov, S. Mioduszewski, R. E. Mischke, G. C. Mishra, J. T. Mitchell, A. K. Mohanty, D. P. Morrison, J. M. Moss, F. Mühlbacher, D. Mukhopadhyay, M. Muniruzzaman, J. Murata, S. Nagamiya, J. L. Nagle, T. Nakamura, B. K. Nandi, M. Nara, J. Newby, P. Nilsson, A. S. Nyanin, J. Nystrand, E. O'Brien, C. A. Ogilvie, H. Ohnishi, I. D. Ojha, K. Okada, M. Ono, V. Onuchin, A. Oskarsson, I. Otterlund, K. Oyama, K. Ozawa, D. Pal, A. P.T. Palounek, V. S. Pantuev, V. Papavassiliou, J. Park, A. Parmar, S. F. Pate, T. Peitzmann, J. C. Peng, V. Peresedov, C. Pinkenburg, R. P. Pisani, F. Plasil, M. L. Purschke, A. K. Purwar, J. Rak, I. Ravinovich, K. F. Read, M. Reuter, K. Reygers, V. Riabov, Y. Riabov, G. Roche, A. Romana, M. Rosati, P. Rosnet, S. S. Ryu, M. E. Sadler, N. Saito, T. Sakaguchi, M. Sakai, S. Sakai, V. Samsonov, L. Sanfratello, R. Santo, H. D. Sato, S. Sato, S. Sawada, Y. Schutz, V. Semenov, R. Seto, M. R. Shaw, T. K. Shea, T. A. Shibata, K. Shigaki, T. Shiina, C. L. Silva, D. Silvermyr, K. S. Sim, C. P. Singh, V. Singh, M. Sivertz, A. Soldatov, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, F. Staley, P. W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S. P. Stoll, T. Sugitate, J. P. Sullivan, E. M. Takagui, A. Taketani, M. Tamai, K. H. Tanaka, Y. Tanaka, K. Tanida, M. J. Tannenbaum, P. Tarján, J. D. Tepe, T. L. Thomas, J. Tojo, H. Torii, R. S. Towell, I. Tserruya, H. Tsuruoka, S. K. Tuli, H. Tydesjö, N. Tyurin, H. W. van Hecke, J. Velkovska, M. Velkovsky, L. Villatte, A. A. Vinogradov, M. A. Volkov, E. Vznuzdaev, X. R. Wang, Y. Watanabe, S. N. White, F. K. Wohn, C. L. Woody, W. Xie, Y. Yang, A. Yanovich, S. Yokkaichi, G. R. Young, I. E. Yushmanov, W. A. Zajc, C. Zhang, S. Zhou, L. Zolin

      Physical Review C - Nuclear Physics69 ( 3 ) 1 - 34910   3 2004

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      Language:English   Publishing type:Research paper (scientific journal)  

      The PHENIX experiment at the Relativistic Heavy Ion Collider has measured charged hadron yields at midrapidity over a wide range of transverse momenta (0.5&lt
      pT&lt
      10 GeV/c) in Au + Au collisions at √s NN =200 GeV. The data are compared to π0 measurements from the same experiment. For both charged hadrons and neutral pions, the yields per nucleon-nucleon collision are significantly suppressed in central compared to peripheral and nucleon-nucleon collisions. The suppression sets in gradually and increases with increasing centrality of the collisions. Above 4-5 GeV/c in pT, a constant and almost identical suppression of charged hadrons and π0's is observed. The pT spectra are compared to published spectra from Au+Au at √sNN=130 in terms of x T scaling. Central and peripheral π0 as well as peripheral charged spectra exhibit the same xT scaling as observed in p+p data.

      DOI: 10.1103/PhysRevC.69.034910

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    • Single identified hadron spectra from root s(NN)=130 GeVAu+Au collisions

      K Adcox, SS Adler, NN Ajitanand, Y Akiba, J Alexander, L Aphecetche, Y Arai, SH Aronson, R Averbeck, TC Awes, KN Barish, RD Bames, J Barrette, B Bassalleck, S Bathe, Baublis, V, A Bazilevsky, S Belikov, FG Bellaiche, ST Belyaev, MJ Bennett, Y Berdnikov, S Botelho, ML Brooks, DS Brown, N Bruner, D Bucher, H Buesching, Bumazhnov, V, G Bunce, JM Burward-Hoy, S Butsyk, TA Carey, P Chand, J Chang, WC Chang, LL Chavez, S Chernichenko, CY Chi, J Chiba, M Chiu, RK Choudhury, T Christ, T Chujo, MS Chung, P Chung, Cianciolo, V, BA Cole, DG d'Enterria, G David, H Delagrange, A Denisov, A Deshpande, EJ Desmond, O Dietzsch, BV Dinesh, A Drees, A Durum, D Dutta, K Ebisu, YV Efremenko, K El Chenawi, H En'yo, S Esumi, L Ewell, T Ferdousi, DE Fields, SL Fokin, Z Fraenkel, A Franz, AD Frawley, SY Fung, S Garpman, TK Ghosh, A Glenn, AL Godoi, Y Goto, SV Greene, MG Perdekamp, SK Gupta, W Guryn, HA Gustafsson, JS Haggerty, H Hamagaki, AG Hansen, H Hara, EP Hartouni, R Hayano, N Hayashi, He, X, TK Hemmick, JM Heuser, M Hibino, JC Hill, DS Ho, K Homma, B Hong, A Hoover, T Ichihara, K Imai, MS Ippolitov, M Ishihara, BV Jacak, WY Jang, J Jia, BM Johnson, SC Johnson, KS Joo, S Kametani, JH Kang, M Kann, SS Kapoor, S Kelly, B Khachaturov, A Khanzadeev, J Kikuchi, DJ Kim, HJ Kim, SY Kim, YG Kim, WW Kinnison, E Kistenev, A Kiyomichi, KC Klein-Boesing, S Klinksiek, L Kochenda, Kochetkov, V, D Koehler, T Kohama, D Kotchetkov, A Kozlov, PJ Kroon, K Kurita, MJ Kweon, Y Kwon, GS Kyle, R Lacey, JG Lajoie, J Lauret, A Lebedev, DM Lee, MJ Leitch, XH Li, Z Li, DJ Lim, MX Liu, Liu, X, Z Liu, CF Maguire, J Mahon, YI Makdisi, Manko, VI, Y Mao, SK Mark, S Markacs, G Martinez, MD Marx, A Masaike, F Matathias, T Matsumoto, PL McGaughey, E Melnikov, M Merschmeyer, F Messer, Y Miake, TE Miller, A Milov, S Mioduszewski, RE Mischke, GC Mishra, JT Mitchell, AK Mohanty, DP Morrison, J Moss, F Muhlbacher, M Muniruzzaman, J Murata, S Nagamiya, Y Nagasaka, JL Nagle, Y Nakada, BK Nandi, J Newby, L Nikkinen, P Nilsson, S Nishimura, AS Nyanin, J Nystrand, E O'Brien, CA Ogilvie, H Ohnishi, ID Ojha, M Ono, Onuchin, V, A Oskarsson, L Osterman, Otterlund, I, K Oyama, L Paffrath, APT Palounek, VS Pantuev, Papavassiliou, V, SF Pate, T Pietzman, AN Petridis, C Pinkenburg, RP Pisani, P Pitukhin, F Plasil, M Pollack, K Pope, ML Purschke, Ravinovich, I, KF Read, K Reygers, Riaboc, V, Y Riabov, M Rosati, AA Rose, SS Ryu, N Saito, A Sakaguchi, T Sakaguchi, H Sako, T Sakuma, Samsonov, V, TC Sangster, R Santo, HD Sato, S Sato, S Sawada, BR Schlei, Y Schutz, Semenov, V, R Seto, TK Shea, Shein, I, TA Shibata, K Shigaki, T Shiina, YH Shin, IG Sibiriak, D Silvermyr, KS Sim, J Simon-Gillo, CP Singh, Singh, V, M Sivertz, A Soldatov, RA Soltz, S Sorensen, PW Stankus, N Starinsky, P Steinberg, E Stenlund, A Ster, SP Stoll, M Sugioka, T Sugitate, JP Sullivan, Y Sumi, Z Sun, M Suzuki, EM Takagui, A Taketani, M Tamai, KH Tanaka, Y Tanaka, E Taniguchi, MJ Tannenbaum, J Thomas, JH Thomas, TL Thomas, W Tian, J Tojo, H Torii, RS Towell, Tserruya, I, H Tsuruoka, AA Tsvetkov, SK Tuli, H Tydesjo, N Tyurin, T Ushiroda, HW van Hecke, C Velissaris, J Velkovska, M Velkovsky, AA Vinogradov, MA Volkov, A Vorobyov, E Vznuzdaev, H Wang, Y Watanabe, SN White, C Witzig, FK Wohn, CL Woody, W Xie, K Yagi, S Yokkaichi, GR Young, IE Yushmanov, WA Zajc, Z Zhang, S Zhou

      PHYSICAL REVIEW C69 ( 2 ) 24904   2 2004

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER PHYSICAL SOC  

      Transverse momentum spectra and yields of hadrons are measured by the PHENIX collaboration in Au+Au collisions at roots(NN)=130 GeV at the Relativistic Heavy Ion Collider. The time-of-flight resolution allows identification of pions to transverse momenta of 2 GeV/c and protons and antiprotons to 4 GeV/c. The yield of pions rises approximately linearly with the number of nucleons participating in the collision, while the number of kaons, protons, and antiprotons increases more rapidly. The shape of the momentum distribution changes between peripheral and central collisions. Simultaneous analysis of all the p(T) spectra indicates radial collective expansion, consistent with predictions of hydrodynamic models. Hydrodynamic analysis of the spectra shows that the expansion velocity increases with collision centrality and collision energy. This expansion boosts the particle momenta, causing the yield from soft processes to exceed that for hard to large transverse momentum, perhaps as large as 3 GeV/c.

      DOI: 10.1103/PhysRevC.69.024904

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    • J / PSI PRODUCTION IN AU AU COLLISIONS AT S(NN)**(1/2) = 200-GEV AT THE RELATIBISTIC HEAVY ION COLLIDER.

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      Phys.Rev.C69:   14901   1 1 2004

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    • J / PSI PRODUCTION FROM PROTON PROTON COLLISIONS AT S**(1/2) = 200-GEV.

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      Phys.Rev.Lett.92:   51802   1 1 2004

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    • Identified charged particle spectra and yields in Au+Au collisions at √SNN=200 GeV

      S. S. Adler, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, J. Alexander, R. Amirikas, L. Aphecetche, S. H. Aronson, R. Averbeck, T. C. Awes, R. Azmoun, V. Babintsev, A. Baldisseri, K. N. Barish, P. D. Barnes, B. Bassalleck, S. Bathe, S. Batsouli, V. Baublis, A. Bazilevsky, S. Belikov, Y. Berdnikov, S. Bhagavatula, J. G. Boissevain, H. Borel, S. Borenstein, M. L. Brooks, D. S. Brown, N. Bruner, D. Bucher, H. Buesching, V. Bumazhnov, G. Bunce, J. M. Burward-Hoy, S. Butsyk, X. Camard, J. S. Chai, P. Chand, W. C. Chang, S. Chernichenko, C. Y. Chi, J. Chiba, M. Chiu, I. J. Choi, J. Choi, R. K. Choudhury, T. Chujo, V. Cianciolo, Y. Cobigo, B. A. Cole, P. Constantin, D. G. d'Enterria, G. David, H. Delagrange, A. Denisov, A. Deshpande, E. J. Desmond, O. Dietzsch, O. Drapier, A. Drees, R. du Rietz, A. Durum, D. Dutta, Y. V. Efremenko, K. El Chenawi, A. Enokizono, H. En'yo, S. Esumi, L. Ewell, D. E. Fields, F. Fleuret, S. L. Fokin, B. D. Fox, Z. Fraenkel, J. E. Frantz, A. Franz, A. D. Frawley, S. Y. Fung, S. Garpman, T. K. Ghosh, A. Glenn, G. Gogiberidze, M. Gonin, J. Gosset, Y. Goto, R. Granier de Cassagnac, N. Grau, S. V. Greene, M. Grosse Perdekamp, W. Guryn, H. A. Gustafsson, T. Hachiya, J. S. Haggerty, H. Hamagaki, A. G. Hansen, E. P. Hartouni, M. Harvey, R. Hayano, X. He, M. Heffner, T. K. Hemmick, J. M. Heuser, M. Hibino, J. C. Hill, W. Holzmann, K. Homma, B. Hong, A. Hoover, T. Ichihara, V. V. Ikonnikov, K. Imai, D. Isenhower, M. Ishihara, M. Issah, A. Isupov, B. V. Jacak, W. Y. Jang, Y. Jeong, J. Jia, O. Jinnouchi, B. M. Johnson, S. C. Johnson, K. S. Joo, D. Jouan, S. Kametani, N. Kamihara, J. H. Kang, S. S. Kapoor, K. Katou, S. Kelly, B. Khachaturov, A. Khanzadeev, J. Kikuchi, D. H. Kim, D. J. Kim, D. W. Kim, E. Kim, G. B. Kim, H. J. Kim, E. Kistenev, A. Kiyomichi, K. Kiyoyama, C. Klein-Boesing, H. Kobayashi, L. Kochenda, V. Kochetkov, D. Koehler, T. Kohama, M. Kopytine, D. Kotchetkov, A. Kozlov, P. J. Kroon, C. H. Kuberg, K. Kurita, Y. Kuroki, M. J. Kweon, Y. Kwon, G. S. Kyle, R. Lacey, V. Ladygin, J. G. Lajoie, A. Lebedev, S. Leckey, D. M. Lee, S. Lee, M. J. Leitch, X. H. Li, H. Lim, A. Litvinenko, M. X. Liu, Y. Liu, C. F. Maguire, Y. I. Makdisi, A. Malakhov, V. I. Manko, Y. Mao, G. Martinez, M. D. Marx, H. Masui, F. Matathias, T. Matsumoto, P. L. McGaughey, E. Melnikov, F. Messer, Y. Miake, J. Milan, T. E. Miller, A. Milov, S. Mioduszewski, R. E. Mischke, G. C. Mishra, J. T. Mitchell, A. K. Mohanty, D. P. Morrison, J. M. Moss, F. Mühlbacher, D. Mukhopadhyay, M. Muniruzzaman, J. Murata, S. Nagamiya, J. L. Nagle, T. Nakamura, B. K. Nandi, M. Nara, J. Newby, P. Nilsson, A. S. Nyanin, J. Nystrand, E. O'Brien, C. A. Ogilvie, H. Ohnishi, I. D. Ojha, K. Okada, M. Ono, V. Onuchin, A. Oskarsson, I. Otterlund, K. Oyama, K. Ozawa, D. Pal, A. P.T. Palounek, V. S. Pantuev, V. Papavassiliou, J. Park, A. Parmar, S. F. Pate, T. Peitzmann, J. C. Peng, V. Peresedov, C. Pinkenburg, R. P. Pisani, F. Plasil, M. L. Purschke, A. K. Purwar, J. Rak, I. Ravinovich, K. F. Read, M. Reuter, K. Reygers, V. Riabov, Y. Riabov, G. Roche, A. Romana, M. Rosati, P. Rosnet, S. S. Ryu, M. E. Sadler, N. Saito, T. Sakaguchi, M. Sakai, S. Sakai, V. Samsonov, L. Sanfratello, R. Santo, H. D. Sato, S. Sato, S. Sawada, Y. Schutz, V. Semenov, R. Seto, M. R. Shaw, T. K. Shea, T. A. Shibata, K. Shigaki, T. Shiina, C. L. Silva, D. Silvermyr, K. S. Sim, C. P. Singh, V. Singh, M. Sivertz, A. Soldatov, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, F. Staley, P. W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S. P. Stoll, T. Sugitate, J. P. Sullivan, E. M. Takagui, A. Taketani, M. Tamai, K. H. Tanaka, Y. Tanaka, K. Tanida, M. J. Tannenbaum, P. Tarján, J. D. Tepe, T. L. Thomas, J. Tojo, H. Torii, R. S. Towell, I. Tserruya, H. Tsuruoka, S. K. Tuli, H. Tydesjö, N. Tyurin, H. W. vanHecke, J. Velkovska, M. Velkovsky, L. Villatte, A. A. Vinogradov, M. A. Volkov, E. Vznuzdaev, X. R. Wang, Y. Watanabe, S. N. White, F. K. Wohn, C. L. Woody, W. Xie, Y. Yang, A. Yanovich, S. Yokkaichi, G. R. Young, I. E. Yushmanov, W. A. Zajc, C. Zhang, S. Zhou, S. J. Zhou, L. Zolin

      Physical Review C - Nuclear Physics69 ( 3 ) 1 - 34909   2004

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Physical Society  

      The centrality dependence of transverse momentum distributions and yields for π±,K±, p, and p in Au +Au collisions at √sNN=200 GeV at midrapidity are measured by the PHENIX experiment at the Relativistic Heavy Ion Collider. We observe a clear particle mass dependence of the shapes of transverse momentum spectra in central collisions below ∼2 GeV/c in pT. Both mean transverse momenta and particle yields per participant pair increase from peripheral to midcentral and saturate at the most central collisions for all particle species. We also measure particle ratios of π-/π+, K -/K+, ̄p/p, K/π, p/π, and ̄p/π as a function of pT and collision centrality. The ratios of equal mass particle yields are independent of pT and centrality within the experimental uncertainties. In central collisions at intermediate transverse momenta ∼1.5-4.5 GeV/c, proton and antiproton yields constitute a significant fraction of the charged hadron production and show a scaling behavior different from that of pions.

      DOI: 10.1103/PhysRevC.69.034909

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    • ANOMALOUSLY HINDERED E2 STRENGTH B(E2:2(1)+ ─&iquest; 0+) IN C-16.

      栗田 和好

      Phys.Rev.Lett.92:   62501   1 1 2004

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    • Elliptic flow of identified hadrons in Au+Au collisions at root s(NN)=200 GeV

      SS Adler, S Afanasiev, C Aidala, NN Ajitanand, Y Akiba, J Alexander, R Amirikas, L Aphecetche, SH Aronson, R Averbeck, TC Awes, R Azmoun, Babintsev, V, A Baldisseri, KN Barish, PD Barnes, B Bassalleck, S Bathe, S Batsouli, Baublis, V, A Bazilevsky, S Belikov, Y Berdnikov, S Bhagavatula, JG Boissevain, H Borel, S Borenstein, ML Brooks, DS Brown, N Bruner, D Bucher, H Buesching, Bumazhnov, V, G Bunce, JM Burward-Hoy, S Butsyk, Camard, X, JS Chai, P Chand, WC Chang, S Chernichenko, CY Chi, J Chiba, M Chiu, IJ Choi, J Choi, RK Choudhury, T Chujo, Cianciolo, V, Y Cobigo, BA Cole, P Constantin, DG d'Enterria, G David, H Delagrange, A Denisov, A Deshpande, EJ Desmond, O Dietzsch, O Drapier, A Drees, R du Rietz, A Durum, D Dutta, YV Efremenko, K El Chenawi, A Enokizono, H En'yo, S Esumi, L Ewell, DE Fields, F Fleuret, SL Fokin, BD Fox, Z Fraenkel, JE Frantz, A Franz, AD Frawley, SY Fung, S Garpman, TK Ghosh, A Glenn, G Gogiberidze, M Gonin, J Gosset, Y Goto, RG de Cassagnac, N Grau, SV Greene, M Grosse Perdekamp, W Guryn, HA Gustafsson, T Hachiya, JS Haggerty, H Hamagaki, AG Hansen, EP Hartouni, M Harvey, R Hayano, He, X, M Heffner, TK Hemmick, JM Heuser, M Hibino, JC Hill, W Holzmann, K Homma, B Hong, A Hoover, T Ichihara, VV Ikonnikov, K Imai, LD Isenhower, M Ishihara, M Issah, A Isupov, BV Jacak, WY Jang, Y Jeong, J Jia, O Jinnouchi, BM Johnson, SC Johnson, KS Joo, D Jouan, S Kametani, N Kamihara, JH Kang, SS Kapoor, K Katou, S Kelly, B Khachaturov, A Khanzadeev, J Kikuchi, DH Kim, DJ Kim, DW Kim, E Kim, GB Kim, HJ Kim, E Kistenev, A Kiyomichi, K Kiyoyama, C Klein-Boesing, H Kobayashi, L Kochenda, Kochetkov, V, D Koehler, T Kohama, M Kopytine, D Kotchetkov, A Kozlov, PJ Kroon, CH Kuberg, K Kurita, Y Kuroki, MJ Kweon, Y Kwon, GS Kyle, R Lacey, Ladygin, V, JG Lajoie, A Lebedev, S Leckey, DM Lee, S Lee, MJ Leitch, XH Li, H Lim, A Litvinenko, MX Liu, Y Liu, CF Maguire, YI Makdisi, A Malakhov, Manko, VI, Y Mao, G Martinez, MD Marx, H Masui, F Matathias, T Matsumoto, PL McGaughey, E Melnikov, F Messer, Y Miake, J Milan, TE Miller, A Milov, S Mioduszewski, RE Mischke, GC Mishra, JT Mitchell, AK Mohanty, DP Morrison, JM Moss, F Muhlbacher, D Mukhopadhyay, M Muniruzzaman, J Murata, S Nagamiya, JL Nagle, T Nakamura, BK Nandi, M Nara, J Newby, P Nilsson, AS Nyanin, J Nystrand, E O'Brien, CA Ogilvie, H Ohnishi, ID Ojha, K Okada, M Ono, Onuchin, V, A Oskarsson, Otterlund, I, K Oyama, K Ozawa, D Pal, APT Palounek, VS Pantuev, Papavassiliou, V, J Park, A Parmar, SF Pate, T Peitzmann, JC Peng, Peresedov, V, C Pinkenburg, RP Pisani, F Plasil, ML Purschke, A Purwar, J Rak, Ravinovich, I, KF Read, M Reuter, K Reygers, Riabov, V, Y Riabov, G Roche, A Romana, M Rosati, P Rosnet, SS Ryu, ME Sadler, N Saito, T Sakaguchi, M Sakai, S Sakai, Samsonov, V, L Sanfratello, R Santo, HD Sato, S Sato, S Sawada, Y Schutz, Semenov, V, R Seto, MR Shaw, TK Shea, TA Shibata, K Shigaki, T Shiina, CL Silva, D Silvermyr, KS Sim, CP Singh, Singh, V, M Sivertz, A Soldatov, RA Soltz, WE Sondheim, SP Sorensen, Sourikova, IV, F Staley, PW Stankus, E Stenlund, M Stepanov, A Ster, SP Stoll, T Sugitate, JP Sullivan, EM Takagui, A Taketani, M Tamai, KH Tanaka, Y Tanaka, K Tanida, MJ Tannenbaum, P Tarjan, JD Tepe, TL Thomas, J Tojo, H Torii, RS Towell, Tserruya, I, H Tsuruoka, SK Tuli, H Tydesjo, N Tyurin, HW van Hecke, J Velkovska, M Velkovsky, L Villatte, AA Vinogradov, MA Volkov, E Vznuzdaev, XR Wang, Y Watanabe, SN White, FK Wohn, CL Woody, W Xie, Y Yang, A Yanovich, S Yokkaichi, GR Young, IE Yushmanov, WA Zajc, C Zhang, S Zhou, L Zolin

      PHYSICAL REVIEW LETTERS91 ( 18 ) 182301   10 2003

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER PHYSICAL SOC  

      The anisotropy parameter (v(2)), the second harmonic of the azimuthal particle distribution, has been measured with the PHENIX detector in Au+Au collisions at roots(NN)=200 GeV for identified and inclusive charged particle production at central rapidities (\eta\&lt;0.35) with respect to the reaction plane defined at high rapidities (\eta\=3-4 ). We observe that the v(2) of mesons falls below that of (anti)baryons for p(T)&gt;2 GeV/c, in marked contrast to the predictions of a hydrodynamical model. A quark-coalescence model is also investigated.

      DOI: 10.1103/PhysRevLett.91.182301

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    • Scaling properties of proton and antiproton production in root s(NN)=200 GeV Au+Au collisions

      SS Adler, S Afanasiev, C Aidala, NN Ajitanand, Y Akiba, J Alexander, R Amirikas, L Aphecetche, SH Aronson, R Averbeck, TC Awes, R Azmoun, Babintsev, V, A Baldisseri, KN Barish, PD Barnes, B Bassalleck, S Bathe, S Batsouli, Baublis, V, A Bazilevsky, S Belikov, Y Berdnikov, S Bhagavatula, JG Boissevain, H Borel, S Borenstein, ML Brooks, DS Brown, N Bruner, D Bucher, H Buesching, Bumazhnov, V, G Bunce, JM Burward-Hoy, S Butsyk, Camard, X, JS Chai, P Chand, WC Chang, S Chernichenko, CY Chi, J Chiba, M Chiu, IJ Choi, J Choi, RK Choudhury, T Chujo, Cianciolo, V, Y Cobigo, BA Cole, P Constantin, DG d'Enterria, G David, H Delagrange, A Denisov, A Deshpande, EJ Desmond, O Dietzsch, O Drapier, A Drees, R du Rietz, A Durum, D Dutta, YV Efremenko, K El Chenawi, A Enokizono, H En'yo, S Esumi, L Ewell, DE Fields, F Fleuret, SL Fokin, BD Fox, Z Fraenkel, JE Frantz, A Franz, AD Frawley, SY Fung, S Garpman, TK Ghosh, A Glenn, G Gogiberidze, M Gonin, J Gosset, Y Goto, RG de Cassagnac, N Grau, SV Greene, G Grosse Perdekamp, W Guryn, HA Gustafsson, T Hachiya, JS Haggerty, H Hamagaki, AG Hansen, EP Hartouni, M Harvey, R Hayano, He, X, M Heffner, TK Hemmick, JM Heuser, M Hibino, JC Hill, W Holzmann, K Homma, B Hong, A Hoover, T Ichihara, VV Ikonnikov, K Imai, LD Isenhower, M Ishihara, M Issah, A Isupov, BV Jacak, WY Jang, Y Jeong, J Jia, O Jinnouchi, BM Johnson, SC Johnson, KS Joo, D Jouan, S Kametani, N Kamihara, JH Kang, SS Kapoor, K Katou, S Kelly, B Khachaturov, A Khanzadeev, J Kikuchi, DH Kim, DJ Kim, DW Kim, E Kim, GB Kim, HJ Kim, E Kistenev, A Kiyomichi, K Kiyoyama, C Klein-Boesing, H Kobayashi, L Kochenda, Kochetkov, V, D Koehler, T Kohama, M Kopytine, D Kotchetkov, A Kozlov, PJ Kroon, CH Kuberg, K Kurita, Y Kuroki, MJ Kweon, Y Kwon, GS Kyle, R Lacey, Ladygin, V, JG Lajoie, A Lebedev, S Leckey, DM Lee, S Lee, MJ Leitch, XH Li, H Lim, A Litvinenko, MX Liu, Y Liu, CF Maguire, YI Makdisi, A Malakhov, Manko, VI, Y Mao, G Martinez, MD Marx, H Masui, F Matathias, T Matsumoto, PL McGaughey, E Melnikov, F Messer, Y Miake, J Milan, TE Miller, A Milov, S Mioduszewski, RE Mischke, GC Mishra, JT Mitchell, AK Mohanty, DP Morrison, JM Moss, F Muhlbacher, D Mukhopadhyay, M Muniruzzaman, J Murata, S Nagamiya, JL Nagle, T Nakamura, BK Nandi, M Nara, J Newby, P Nilsson, AS Nyanin, J Nystrand, E O'Brien, CA Ogilvie, H Ohnishi, ID Ojha, K Okada, M Ono, Onuchin, V, A Oskarsson, Otterlund, I, K Oyama, K Ozawa, D Pal, APT Palounek, VS Pantuev, Papavassiliou, V, J Park, A Parmar, SF Pate, T Peitzmann, JC Peng, Peresedov, V, C Pinkenburg, RP Pisani, F Plasil, ML Purschke, A Purwar, J Rak, Ravinovich, I, KF Read, M Reuter, K Reygers, Riabov, V, Y Riabov, G Roche, A Romana, M Rosati, P Rosnet, SS Ryu, ME Sadler, N Saito, T Sakaguchi, M Sakai, S Sakai, Samsonov, V, L Sanfratello, R Santo, HD Sato, S Sato, S Sawada, Y Schutz, Semenov, V, R Seto, MR Shaw, TK Shea, TA Shibata, K Shigaki, T Shiina, CL Silva, D Silvermyr, KS Sim, CP Singh, Singh, V, M Sivertz, A Soldatov, RA Soltz, WE Sondheim, SP Sorensen, Sourikova, IV, F Staley, PW Stankus, E Stenlund, M Stepanov, A Ster, SP Stoll, T Sugitate, JP Sullivan, EM Takagui, A Taketani, M Tamai, KH Tanaka, Y Tanaka, K Tanida, MJ Tannenbaum, P Tarjan, JD Tepe, TL Thomas, J Tojo, H Torii, RS Towell, Tserruya, I, H Tsuruoka, SK Tuli, H Tydesjo, N Tyurin, HW van Hecke, J Velkovska, M Velkovsky, L Villatte, AA Vinogradov, MA Volkov, E Vznuzdaev, XR Wang, Y Watanabe, SN White, FK Wohn, CL Woody, W Xie, Y Yang, A Yanovich, S Yokkaichi, GR Young, IE Yushmanov, WA Zajc, C Zhang, S Zhou, L Zolin

      PHYSICAL REVIEW LETTERS91 ( 17 ) 172301   10 2003

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER PHYSICAL SOC  

      We report on the yield of protons and antiprotons, as a function of centrality and transverse momentum, in Au+Au collisions at rootS(NN)=200 GeV measured at midrapidity by the PHENIX experiment at the BNL Relativistic Heavy Ion Collider. In central collisions at intermediate transverse momenta (1.5&lt;p(T)&lt;4.5 GeV/c) a significant fraction of all produced particles are protons and antiprotons. They show a centrality-scaling behavior different from that of pions. The (p) over bar/pi and p/pi ratios are enhanced compared to peripheral Au+Au, p+p, and e(+)e(-) collisions. This enhancement is limited to p(T)&lt;5 GeV/c as deduced from the ratio of charged hadrons to pi(0) measured in the range 1.5&lt;p(T)&lt;9 GeV/c.

      DOI: 10.1103/PhysRevLett.91.172301

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    • Further observations on midrapidity E-T distributions with aperture corrected scale

      T Abbott, L Ahle, Y Akiba, D Alburger, D Beavis, L Birstein, MA Bloomer, PD Bond, HC Britt, B Budick, C Chasman, Z Chen, CY Chi, YY Chu, Cianciolo, V, BA Cole, JB Costales, HJ Crawford, JB Cumming, R Debbe, E Duek, J Engelage, SY Fung, M Gonin, L Grodzins, S Gushue, H Hamagaki, O Hansen, RS Hayano, S Hayashi, S Homma, HZ Huang, Y Ikeda, Juricic, I, H Kaneko, J Kang, S Katcoff, S Kaufman, WL Kehoe, K Kimura, K Kitamura, K Kurita, RJ Ledoux, MJ LeVine, Y Miake, DP Morrison, RJ Morse, B Moskowitz, S Nagamiya, MN Namboodiri, TK Nayak, J Olness, CG Parsons, LP Remsberg, P Rothschild, H Sakurai, TC Sangster, M Sarabura, R Seto, K Shigaki, A Shor, R Soltz, P Stankus, SG Steadman, GSF Stephans, T Sugitate, T Sung, M Tanaka, MJ Tannenbaum, J Thomas, S Tonse, M Torikoshi, S Ueno-Hayashi, JH van Dijk, F Videbaek, M Vient, P Vincent, O Vossnack, E Vulgaris, Vutsadakis, V, FQ Wang, Y Wang, WA Watson, HE Wegner, DS Woodruff, YD Wu, K Yagi, Yang, X, D Zachary, WA Zajc

      PHYSICAL REVIEW C68 ( 3 ) 34908   9 2003

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER PHYSICAL SOC  

      In a previous publication [T. Abbott , E802 Collaboration, Phys. Rev. C 63, 064602 (2001); 64, 029901(E) (2001)], measurements of the A dependence and pseudorapidity interval (deltaeta) dependence of midrapidity E-T distributions in a half-azimuth (Deltaphi=pi) electromagnetic calorimeter were presented for p+Be, p+Au, O+Cu, Si+Au, and Au+Au collisions at the BNL-AGS. The validity of the "nuclear geometry" characterization versus deltaeta was illustrated by plots of the E-T(deltaeta) distribution in each deltaeta interval in units of the measured &lt;E-T(deltaeta)&gt;(p+Au) in the same deltaeta interval for p+Au collisions. These plots, with aperture corrected scale in the physically meaningful units of number of average observed p+Au collisions, were nearly universal as a function of deltaeta, confirming that the reaction dynamics for E-T production at midrapidity at AGS energies is governed by the number of projectile participants and can be well characterized by measurements in apertures as small as Deltaphi=pi,deltaeta=0.3. A key ingredient in these analyses is the probability p(0) for no signal to be detected in a given aperture deltaeta for the fundamental p+Au collision. In fact the measured &lt;E-T(deltaeta)&gt;(p+Au) is biased and the true &lt;E-T(deltaeta)&gt;(true)(p+Au) for the detector aperture is the measured value times 1-p(0). The issues and merits of measuring the E-T(deltaeta) distribution in units of &lt;E-T(deltaeta)&gt;(p+Au) or &lt;E-T(deltaeta)&gt;(true)(p+Au) in the same deltaeta interval are presented and discussed. This method has application at RHIC, where p-p data could be used as the reference distribution for two participants. The E-T distributions for B+A collisions, with E-T(deltaeta) scale normalized by &lt;E-T(deltaeta)&gt;(true)(p-p) in the same aperture for p-p collisions, would then be given directly in the popular unit "per participant-pair" [K. Adcox , PHENIX Collaboration, Phys. Rev. Lett. 86, 3500 (2001); I. G. Bearden , BRAHMS Collaboration, Phys. Lett. B523, 227 (2001); B. B. Back , PHOBOS Collaboration, Phys. Rev. C 65, 031901(R) (2002); C. Adler , STAR Collaboration, Phys. Rev. Lett. 89, 202301 (2002)].

      DOI: 10.1103/PhysRevC.68.034908

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    • Suppressed pi(0) production at large transverse momentum in central Au plus Au collisions at root s(NN)=200 GeV

      SS Adler, S Afanasiev, C Aidala, NN Ajitanand, Y Akiba, J Alexander, R Amirikas, L Aphecetche, SH Aronson, R Averbeck, TC Awes, R Azmoun, Babintsev, V, A Baldisseri, KN Barish, PD Barnes, B Bassalleck, S Bathe, S Batsouli, Baublis, V, A Bazilevsky, S Belikov, Y Berdnikov, S Bhagavatula, JG Boissevain, H Borel, S Borenstein, ML Brooks, DS Brown, N Bruner, D Bucher, H Buesching, Bumazhnov, V, G Bunce, JM Burward-Hoy, S Butsyk, Camard, X, JS Chai, P Chand, WC Chang, S Chernichenko, CY Chi, J Chiba, M Chiu, IJ Choi, J Choi, RK Choudhury, T Chujo, Cianciolo, V, Y Cobigo, BA Cole, P Constantin, DG d'Enterria, G David, H Delagrange, A Denisov, A Deshpande, EJ Desmond, O Dietzsch, O Drapier, A Drees, KA Drees, R du Rietz, A Durum, D Dutta, YV Efremenko, K El Chenawi, A Enokizono, H En'yo, S Esumi, L Ewell, DE Fields, F Fleuret, SL Fokin, BD Fox, Z Fraenkel, JE Frantz, A Franz, AD Frawley, SY Fung, S Garpman, TK Ghosh, A Glenn, G Gogiberidze, M Gonin, J Gosset, Y Goto, RG de Cassagnac, N Grau, SV Greene, MG Perdekamp, W Guryn, HA Gustafsson, T Hachiya, JS Haggerty, H Hamagaki, AG Hansen, EP Hartouni, M Harvey, R Hayano, He, X, M Heffner, TK Hemmick, JM Heuser, M Hibino, JC Hill, W Holzmann, K Homma, B Hong, A Hoover, T Ichihara, VV Ikonnikov, K Imai, L Isenhower, M Ishihara, M Issah, A Isupov, BV Jacak, WY Jang, Y Jeong, J Jia, O Jinnouchi, BM Johnson, SC Johnson, KS Joo, D Jouan, S Kametani, N Kamihara, JH Kang, SS Kapoor, K Katou, S Kelly, B Khachaturov, A Khanzadeev, J Kikuchi, DH Kim, DJ Kim, DW Kim, E Kim, GB Kim, HJ Kim, E Kistenev, A Kiyomichi, K Kiyoyama, C Klein-Boesing, H Kobayashi, L Kochenda, Kochetkov, V, D Koehler, T Kohama, M Kopytine, D Kotchetkov, A Kozlov, PJ Kroon, CH Kuberg, K Kurita, Y Kuroki, MJ Kweon, Y Kwon, GS Kyle, R Lacey, Ladygin, V, JG Lajoie, A Lebedev, S Leckey, DM Lee, S Lee, MJ Leitch, XH Li, H Lim, A Litvinenko, MX Liu, Y Liu, CF Maguire, YI Makdisi, A Malakhov, Manko, VI, Y Mao, G Martinez, MD Marx, H Masui, F Matathias, T Matsumoto, PL McGaughey, E Melnikov, F Messer, Y Miake, J Milan, TE Miller, A Milov, S Mioduszewski, RE Mischke, GC Mishra, JT Mitchell, AK Mohanty, DP Morrison, JM Moss, F Muhlbacher, D Mukhopadhyay, M Muniruzzaman, J Murata, S Nagamiya, JL Nagle, T Nakamura, BK Nandi, M Nara, J Newby, P Nilsson, AS Nyanin, J Nystrand, E O'Brien, CA Ogilvie, H Ohnishi, ID Ojha, K Okada, M Ono, Onuchin, V, A Oskarsson, Otterlund, I, K Oyama, K Ozawa, D Pal, APT Palounek, VS Pantuev, Papavassiliou, V, J Park, A Parmar, SF Pate, T Peitzmann, JC Peng, Peresedov, V, C Pinkenburg, RP Pisani, F Plasil, ML Purschke, AK Purwar, J Rak, Ravinovich, I, KF Read, M Reuter, K Reygers, Riabov, V, Y Riabov, G Roche, A Romana, M Rosati, P Rosnet, SS Ryu, ME Sadler, N Saito, T Sakaguchi, M Sakai, S Sakai, Samsonov, V, L Sanfratello, R Santo, HD Sato, S Sato, S Sawada, Y Schutz, Semenov, V, R Seto, MR Shaw, TK Shea, TA Shibata, K Shigaki, T Shiina, CL Silva, D Silvermyr, KS Sim, CP Singh, Singh, V, M Sivertz, A Soldatov, RA Soltz, WE Sondheim, SP Sorensen, Sourikova, IV, F Staley, PW Stankus, E Stenlund, M Stepanov, A Ster, SP Stoll, T Sugitate, JP Sullivan, EM Takagui, A Taketani, M Tamai, KH Tanaka, Y Tanaka, K Tanida, MJ Tannenbaum, P Tarjan, JD Tepe, TL Thomas, J Tojo, H Torii, RS Towell, Tserruya, I, H Tsuruoka, SK Tuli, H Tydesjo, N Tyurin, HW van Hecke, J Velkovska, M Velkovsky, L Villatte, AA Vinogradov, MA Volkov, E Vznuzdaev, XR Wang, Y Watanabe, SN White, FK Wohn, CL Woody, W Xie, Y Yang, A Yanovich, S Yokkaichi, GR Young, IE Yushmanov, WA Zajc, C Zhang, S Zhou, L Zolin

      PHYSICAL REVIEW LETTERS91 ( 7 ) 72301   8 2003

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER PHYSICAL SOC  

      Transverse momentum spectra of neutral pions in the range 1&lt;p(T)&lt;10 GeV/c have been measured at midrapidity by the PHENIX experiment at BNL RHIC in Au+Au collisions at roots(NN)=200 GeV. The pi(0) multiplicity in central reactions is significantly below the yields measured at the same roots(NN) in peripheral Au+Au and p+p reactions scaled by the number of nucleon-nucleon collisions. For the most central bin, the suppression factor is similar to2.5 at p(T)=2 GeV/c and increases to similar to4-5 at p(T)approximate to4 GeV/c. At larger p(T), the suppression remains constant within errors. The deficit is already apparent in semiperipheral reactions and increases smoothly with centrality.

      DOI: 10.1103/PhysRevLett.91.072301

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    • Absence of suppression in particle production at large transverse momentum in root s(NN)=200 GeV d+Au collisions

      SS Adler, S Afanasiev, C Aidala, NN Ajitanand, Y Akiba, A Al-Jamel, J Alexander, K Aoki, L Aphecetche, R Armendariz, SH Aronson, R Averbeck, TC Awes, Babintsev, V, A Baldisseri, KN Barish, PD Barnes, B Bassalleck, S Bathe, S Batsouli, Baublis, V, F Bauer, A Bazilevsky, S Belikov, MT Bjorndal, JG Boissevain, H Borel, ML Brooks, DS Brown, N Bruner, D Bucher, H Buesching, Bumazhnov, V, G Bunce, JM Burward-Hoy, S Butsyk, Camard, X, P Chand, WC Chang, S Chernichenko, CY Chi, J Chiba, M Chiu, IJ Choi, RK Choudhury, T Chujo, Cianciolo, V, Y Cobigo, BA Cole, MP Comets, P Constantin, M Csanad, T Csorgo, JP Cussonneau, D d'Enterria, K Das, G David, F Deak, H Delagrange, A Denisov, A Deshpande, EJ Desmond, A Devismes, O Dietzsch, JL Drachenberg, O Drapier, A Drees, A Durum, D Dutta, Dzhordzhadze, V, YV Efremenko, H En'yo, B Espagnon, S Esumi, DE Fields, C Finck, F Fleuret, SL Fokin, BD Fox, Z Fraenkel, JE Frantz, A Franz, AD Frawley, Y Fukao, SY Fung, S Gadrat, M Germain, A Glenn, M Gonin, J Gosset, Y Goto, RG de Cassagnac, N Grau, SV Greene, MG Perdekamp, HA Gustafsson, T Hachiya, JS Haggerty, H Hamagaki, AG Hansen, EP Hartouni, M Harvey, K Hasuko, R Hayano, He, X, M Heffner, TK Hemmick, JM Heuser, P Hidas, H Hiejima, JC Hill, R Hobbs, W Holzmann, K Homma, B Hong, A Hoover, T Horaguchi, T Ichihara, VV Ikonnikov, K Imai, M Inuzuka, D Isenhower, L Isenhower, M Issah, A Isupov, BV Jacak, J Jia, O Jinnouchi, BM Johnson, SC Johnson, KS Joo, D Jouan, F Kajihara, S Kametani, N Kamihara, M Kaneta, JH Kang, K Katou, T Kawabata, A Kazantsev, S Kelly, B Khachaturov, A Khanzadeev, J Kikuchi, DJ Kim, E Kim, GB Kim, HJ Kim, E Kinney, A Kiss, E Kistenev, A Kiyomichi, C Klein-Boesing, H Kobayashi, Kochetkov, V, R Kohara, B Komkov, M Konno, D Kotchetkov, A Kozlov, PJ Kroon, CH Kuberg, GJ Kunde, K Kurita, MJ Kweon, Y Kwon, GS Kyle, R Lacey, JG Lajoie, Y Le Bornec, A Lebedev, S Leckey, DM Lee, MJ Leitch, MAL Leite, Li, X, XH Li, H Lim, A Litvinenko, MX Liu, CF Maguire, YI Makdisi, A Malakhov, Manko, VI, Y Mao, G Martinez, H Masui, F Matathias, T Matsumoto, MC McCain, PL McGaughey, Y Miake, TE Miller, A Milov, S Mioduszewski, GC Mishra, JT Mitchell, AK Mohanty, DP Morrison, JM Moss, D Mukhopadhyay, M Muniruzzaman, S Nagamiya, JL Nagle, T Nakamura, J Newby, AS Nyanin, J Nystrand, E O'Brien, CA Ogilvie, H Ohnishi, ID Ojha, H Okada, K Okada, A Oskarsson, Otterlund, I, K Oyama, K Ozawa, D Pal, APT Palounek, Pantuev, V, Papavassiliou, V, J Park, WJ Park, SF Pate, H Pei, Penev, V, JC Peng, H Pereira, Peresedov, V, A Pierson, C Pinkenburg, RP Pisani, ML Purschke, AK Purwar, J Qualls, J Rak, Ravinovich, I, KF Read, M Reuter, K Reygers, Riabov, V, Y Riabov, G Roche, A Romana, M Rosati, S Rosendahl, P Rosnet, VL Rykov, SS Ryu, N Saito, T Sakaguchi, S Sakai, Samsonov, V, L Sanfratello, R Santo, HD Sato, S Sato, S Sawada, Y Schutz, Semenov, V, R Seto, TK Shea, Shein, I, TA Shibata, K Shigaki, M Shimomura, A Sickles, CL Silva, D Silvermyr, KS Sim, A Soldatov, RA Soltz, WE Sondheim, S Sorensen, Sourikova, IV, F Staley, PW Stankus, E Stenlund, M Stepanov, A Ster, SP Stoll, T Sugitate, JP Sullivan, S Takagi, EM Takagui, A Taketani, KH Tanaka, Y Tanaka, K Tanida, MJ Tannenbaum, A Taranenko, P Tarjan, TL Thomas, M Togawa, J Tojo, H Torii, RS Towell, VN Tram, Tserruya, I, Y Tsuchimoto, H Tydesjo, N Tyurin, TJ Uam, HW van Hecke, J Velkovska, M Velkovsky, Veszpremi, V, AA Vinogradov, MA Volkov, E Vznuzdaev, XR Wang, Y Watanabe, SN White, N Willis, FK Wohn, CL Woody, W Xie, A Yanovich, S Yokkaichi, GR Young, IE Yushmanov, WA Zajc, C Zhang, S Zhou, J Zimanyi, L Zolin, Zong, X

      PHYSICAL REVIEW LETTERS91 ( 7 ) 72303   8 2003

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER PHYSICAL SOC  

      Transverse momentum spectra of charged hadrons with p(T)&lt;8 GeV/c and neutral pions with p(T)&lt;10 GeV/c have been measured at midrapidity by the PHENIX experiment at BNL RHIC in d+Au collisions at roots(NN)=200 GeV. The measured yields are compared to those in p+p collisions at the same roots(NN) scaled up by the number of underlying nucleon-nucleon collisions in d+Au. The yield ratio does not show the suppression observed in central Au+Au collisions at RHIC. Instead, there is a small enhancement in the yield of high momentum particles.

      DOI: 10.1103/PhysRevLett.91.072303

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    • Centrality dependence of the high (PT) charged hadron suppression in Au+Au collisions at root s(NN)=130 GeV

      K Adcox, SS Adler, NN Ajitanand, Y Akiba, J Alexander, L Aphecetche, Y Arai, SH Aronson, R Averbeck, TC Awes, KN Barish, PD Barnes, J Barrette, B Bassalleck, S Bathe, Baublis, V, A Bazilevsky, S Belikov, FG Bellaiche, ST Belyaev, MJ Bennett, Y Berdnikov, S Botelho, ML Brooks, DS Brown, N Bruner, D Bucher, H Buesching, Bumazhnov, V, G Bunce, J Burward-Hoy, S Butsyk, TA Carey, P Chand, J Chang, WC Chang, LL Chavez, S Chernichenko, CY Chi, J Chiba, M Chiu, RK Choudhury, T Christ, T Chujo, MS Chung, P Chung, Cianciolo, V, BA Cole, DG D'Enterria, G David, H Delagrange, A Denisov, A Deshpande, EJ Desmond, O Dietzsch, BV Dinesh, A Drees, A Durum, D Dutta, K Ebisu, YV Efremenko, K El Chenawi, H En'yo, S Esumi, L Ewell, T Ferdousi, DE Fields, SL Fokin, Z Fraenkel, A Franz, AD Frawley, SY Fung, S Garpman, TK Ghosh, A Glenn, AL Godoi, Y Goto, SV Greene, MG Perdekamp, SK Gupta, W Guryn, HA Gustafsson, JS Haggerty, H Hamagaki, AG Hansen, H Kara, EP Hartouni, R Hayano, N Hayashi, He, X, TK Hemmick, JM Heuser, M Hibino, JC Hill, DS Ho, K Homma, B Hong, A Hoover, T Ichihara, K Imai, MS Ippolitov, M Ishihara, BV Jacak, WY Jang, J Jia, BM Johnson, SC Johnson, KS Joo, S Kametani, JH Kang, M Kann, SS Kapoor, S Kelly, B Khachaturov, A Khanzadeev, J Kikuchi, DJ Kim, HJ Kim, SY Kim, YG Kim, WW Kinnison, E Kistenev, A Kiyomichi, C Klein-Boesing, S Klinksiek, L Kochenda, Kochetkov, V, D Koehler, T Kohama, D Kotchetkov, A Kozlov, PJ Kroon, K Kurita, MJ Kweon, Y Kwon, GS Kyle, R Lacey, JG Lajoie, J Lauret, A Lebedev, DM Lee, MJ Leitch, XH Li, Z Li, DJ Lim, MX Liu, Liu, X, Z Liu, CF Maguire, J Mahon, YI Makdisi, Manko, VI, Y Mao, SK Mark, S Markacs, G Martinez, MD Marx, A Masaike, F Matathias, T Matsumoto, PL McGaughey, E Melnikov, M Merschmeyer, F Messer, M Messer, Y Miake, TE Miller, A Milov, S Mioduszewski, RE Mischke, GC Mishra, JT Mitchell, AK Mohanty, DP Morrison, JM Moss, F Muhlbacher, M Muniruzzaman, J Murata, S Nagamiya, Y Nagasaka, JL Nagle, Y Nakada, BK Nandi, J Newby, L Nikkinen, P Nilsson, S Nishimura, AS Nyanin, J Nystrand, E O'Brien, CA Ogilvie, H Ohnishi, ID Ojha, M Ono, Onuchin, V, A Oskarsson, L Osterman, Otterlund, I, K Oyama, L Paffrath, APT Palounek, VS Pantuev, Papavassiliou, V, SF Pate, T Peitzmann, AN Petridis, C Pinkenburg, RP Pisani, P Pitukhin, F Plasil, M Pollack, K Pope, ML Purschke, Ravinovich, I, KF Read, K Reygers, Riabov, V, Y Riabov, M Rosati, AA Rose, SS Ryu, N Saito, A Sakaguchi, T Sakaguchi, H Sako, T Sakuma, Samsonov, V, TC Sangster, R Santo, HD Sato, S Sato, S Sawada, BR Schlei, Y Schutz, Semenov, V, R Seto, TK Shea, Shein, I, TA Shibata, K Shigaki, T Shiina, YH Shin, IG Sibiriak, D Silvermyr, KS Sim, J Simon-Gillo, CP Ssingh, Singh, V, M Sivertz, A Soldatov, RA Soltz, S Sorensen, PW Stankus, N Starinsky, P Steinberg, E Stenlund, A Ster, SP Stoll, M Sugioka, T Sugitate, JP Sullivan, Y Sumi, Z Sun, M Suzuki, EM Takagui, A Taketani, M Tamai, KH Tanaka, Y Tanaka, E Taniguchi, MJ Tannenbaum, J Thomas, JH Thomas, TL Thomas, W Tian, J Tojo, H Torii, RS Towell, Tserruya, I, H Tsuruoka, AA Tsvetkov, SK Tuli, H Tydesjo, N Tyurin, T Ushiroda, HW van Hecke, C Velissaris, J Velkovska, M Velkovsky, AA Vinogradov, AM Volkov, A Vorobyov, E Vznuzdaev, H Wang, Y Watanabe, SN White, C Witzig, FK Wohn, CL Woody, W Xie, K Yagi, S Yokkaichi, GR Young, IE Yushmanov, WA Zajc, Z Zhang, S Zhou

      PHYSICS LETTERS B561 ( 1-2 ) 82 - 92   5 2003

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE BV  

      PHENIX has measured the centrality dependence of charged hadron p(T) spectra from Au +An collisions at root(s)NN = 130 GeV The truncated mean p(T) decreases with centrality for p(T) &gt; 2 GeV/c, indicating an apparent reduction of the contribution from hard scattering to high p(T) hadrdn production. For central collisions the yield at high p(T) is shown to be suppressed compared to binary nucleon-nucleon collision scaling of p + p, data. This suppression is monotonically increasing with centrality, but most of the change occurs below 30% centrality, i.e., for collisions with less than similar to140 participating nucleons. The observed p(T) and centrality dependence is consistent with the particle production predicted by models including hard scattering and subsequent energy loss of the scattered partons in the dense matter created in the collisions. (C) 2003 Published by Elsevier Science B.V.

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    • PHENIX detector overview

      K Adcox, SS Adler, M Aizama, NN Ajitanand, Y Akiba, H Akikawa, J Alexander, A Al-Jamel, M Allen, G Alley, R Amirikas, L Aphecetche, Y Arai, JB Archuleta, Archuleta, JR, R Armendariz, Armijo, V, SH Aronson, D Autrey, R Averbeck, TC Awes, B Azmoun, A Baldisseri, J Banning, KN Barish, AB Barker, PD Barnes, J Barrette, F Barta, B Bassalleck, S Bathe, S Batsouli, VV Baublis, A Bazilevsky, R Begay, J Behrendt, S Belikov, R Belkin, FG Bellaiche, ST Belyaev, MJ Bennett, Y Berdnikov, S Bhaganatula, JC Biggs, AW Bland, C Blume, M Bobrek, JG Boissevain, S Boose, H Borel, D Borland, E Bosze, S Botelho, J Bowers, C Britton, L Britton, ML Brooks, AW Brown, DS Brown, N Bruner, WL Bryan, D Bucher, H Buesching, Bumazhnov, V, G Bunce, J Burward-Hoy, SA Butsyk, MM Cafferty, TA Carey, JS Chai, P Chand, J Chang, WC Chang, RB Chappell, LL Chavez, S Chernichenko, CY Chiu, J Chiba, M Chiu, S Chollet, RK Choudhury, T Christ, T Chujo, MS Chung, P Chung, Cianciolo, V, DJ Clark, Y Cobigo, BA Cole, P Constantin, R Conway, KC Cook, DW Crook, H Cunitz, R Cunningham, M Cutshaw, DG D'Enterria, CM Dabrowski, G Danby, S Daniels, A Danmura, G David, A Debraine, H Delagrange, J DeMoss, A Denisov, A Deshpande, EJ Desmond, O Dietzsch, BV Dinesh, JL Drachenberg, O Drapier, A Drees, R du Rietz, A Durum, D Dutta, K Ebisu, MA Echave, YV Efremenko, K El Chenawi, MS Emery, D Engo, A Enokizono, K Enosawa, H En'yo, N Ericson, S Esumi, VA Evseev, L Ewell, O Fackler, J Fellenstein, T Ferdousi, J Ferrierra, DE Fields, F Fleuret, SL Fokin, B Fox, Z Fraenkel, S Frank, A Franz, JE Frantz, AD Frawley, J Fried, JP Freidberg, E Fujisawa, H Funahashi, SY Fung, S Gadrat, J Gannon, S Garpman, F Gastaldi, TF Gee, R Gentry, TK Ghosh, P Giannotti, A Glenn, AL Godoi, M Gonin, G Gogiberidze, J Gosset, Y Goto, RG de Cassagnac, SV Greene, Griffin, V, MG Perdekamp, SK Gupta, W Guryn, HA Gustafsson, T Hachiya, JS Haggerty, S Hahn, J Halliwell, H Hamagaki, RH Hance, AG Hansen, H Hara, J Harder, GW Hart, EP Hartouni, A Harvey, L Hawkins, RS Hayano, H Hayashi, N Hayashi, He, X, N Heine, F Heistermann, S Held, TK Hemmick, JM Heuser, M Hibino, JS Hicks, R Higuchi, JC Hill, T Hirano, DS Ho, R Hoade, W Holzmann, K Homma, B Hong, A Hoover, T Honaguchi, CT Hunter, DE Hurst, R Hutter, T Ichihara, VV Ikonnikov, K Imai, M Inaba, MS Ippolitov, LD Isenhower, LD Isenhower, M Ishihara, M Issah, Ivanov, VI, BV Jacak, G Jackson, J Jackson, D Jaffe, U Jagadish, WY Jang, R Jayakumar, J Jia, BM Johnson, J Johnson, SC Johnson, JP Jones, K Jones, KS Joo, D Jouan, S Kahn, F Kajihara, S Kametani, N Kamihara, Y Kamyshkov, A Kandasamy, JH Kang, MR Kann, SS Kapoor, J Kapustinsky, KV Karadjev, Kashikhin, V, S Kato, K Katou, HJ Kehayias, MA Kelley, S Kelly, M Kennedy, B Khachaturov, AV Khanzadeev, A Khomutnikov, J Kikuchi, DJ Kim, DW Kim, GB Kim, HJ Kim, SY Kim, YG Kim, WW Kinnison, E Kistenev, A Kiyomichi, C Klein-Boesing, S Klinksiek, L Kluberg, H Kobayashi, Kochetkov, V, D Koehler, T Kohama, BG Komkov, ML Kopytine, K Koseki, L Kotchenda, D Kotchetkov, IA Koutcheryaev, A Kozlov, VS Kozlov, PA Kravtsov, PJ Kroon, CH Kuberg, LG Kudin, M Kurata-Nishimura, VV Kuriatkov, K Kurita, Y Kuroki, MJ Kweon, Y Kwon, GS Kyle, JJ LaBounty, R Lacey, JG Lajoie, J Lauret, A Lebedev, VA Lebedev, VD Lebedev, DM Lee, S Lee, M Leitch, M Lenz, W Lenz, XH Li, Z Li, B Libby, M Libkind, W Liccardi, DJ Lim, S Lin, MX Liu, Liu, X, Y Liu, Z Liu, E Lockner, N Longbotham, JD Lopez, R Machnowski, CF Maguire, J Mahon, YI Makdisi, Manko, VI, Y Mao, S Marino, SK Mark, S Markacs, DG Markushin, G Martinez, XB Martinez, MD Marx, A Masaike, F Matathias, T Matsumoto, PL McGaughey, MC McCain, J Mead, E Melnikov, Y Melnikov, WZ Meng, M Merschmeyer, F Messer, M Messer, Y Miake, NM Miftakhov, S Migluolio, J Milan, TE Miller, A Milov, K Minuzzo, S Mioduszewski, RE Mischke, GC Mishra, JT Mitchell, Y Miyamoto, AK Mohanty, BC Montoya, A Moore, T Moore, DP Morrison, GG Moscone, JM Moss, F Muhlbacher, M Muniruzzaman, J Murata, MM Murray, M Musrock, S Nagamiya, Y Nagasaka, JL Nagle, Y Nakada, T Nakamura, BK Nandi, J Negrin, J Newby, L Nikkinen, SA Nikolaev, P Nilsson, S Nishimura, AS Nyanin, J Nystrand, E O'Brien, P O'Conner, F Obenshain, CA Ogilvie, H Ohnishi, ID Ojha, M Ono, Onuchin, V, A Oskarsson, L Osterman, Otterlund, I, K Oyama, L Paffrath, APT Palounek, CE Pancake, VS Pantuev, Papavassiliou, V, SF Pate, T Peitzmann, R Petersen, AN Petridis, CH Pinkenburg, RP Pisani, P Pitukhin, T Plagge, F Plasil, M Pollack, K Pope, R Prigl, ML Purschke, AK Purwar, JM Qualls, S Rankowitz, G Rao, R Rao, M Rau, Ravinovich, I, R Raynis, KF Read, K Reygers, G Riabov, VG Riabov, YG Riabov, SH Robinson, G Roche, A Romana, M Rosati, EV Roschin, AA Rose, P Rosnet, R Roth, R Ruggiero, SS Ryu, N Saito, A Sakaguchi, T Sakaguchi, S Sakai, H Sako, T Sakuma, S Salomone, VM Samsonov, WF Sandhoff, L Sanfratello, TC Sangster, R Santo, HD Sato, S Sato, R Savino, S Sawada, BR Schlei, R Schleuter, Y Schutz, M Sekimoto, Semenov, V, R Seto, Y Severgin, A Shajii, Shangin, V, MR Shaw, TK Shea, Shein, I, Shelikhov, V, TA Shibata, K Shigaki, T Shiina, T Shimada, YH Shin, IG Sibiriak, D Silvermyr, KS Sim, J Simon-Gillo, M Simpson, CP Singh, Singh, V, W Sippach, M Sivertz, HD Skank, S Skutnik, GA Sleege, DC Smith, GD Smith, M Smith, A Soldatov, GP Solodov, RA Soltz, WE Sondheim, S Sorensen, Sourikova, I, F Staley, PW Stankus, N Starinsky, S Steffens, EM Stein, P Steinberg, E Stenlund, M Stepanov, A Ster, J Stewering, W Stokes, SP Stoll, M Sugioka, T Sugitate, JP Sullivan, Y Sumi, Z Sun, M Suzuki-Nara, EM Takagui, A Taketani, M Tamai, KH Tanaka, Y Tanaka, E Taniguchi, MJ Tannenbaum, Tarakanov, VI, OP Tarasenkova, JD Tepe, R Thern, JH Thomas, JL Thomas, TL Thomas, WD Thomas, GW Thornton, W Tian, R Todd, J Tojo, F Toldo, H Torii, RS Towell, J Tradeski, VA Trofimov, Tserruya, I, H Tsuruoka, AA Tsvetkov, SK Tulli, G Turner, H Tydesjo, N Tyurin, S Urasawa, A Usachev, T Ushiroda, HW van Hecke, M Van Lith, AA Vasiliev, Vasiliev, V, M Vassent, C Velissaris, J Velkovska, M Velkovsky, W Verhoeven, L Villatte, AA Vinogradov, Vishnevskii, VI, MA Volkov, W Von Achen, AA Vorobyov, EA Vznuzdaev, M Vznuzdaev, JW Walker, Y Wan, HQ Wang, S Wang, Y Watanabe, LC Watkins, T Weimer, SN White, BR Whitus, C Williams, PS Willis, AL Wintenberg, C Witzig, FK Wohn, K Wolniewicz, BG Wong-Swanson, L Wood, CL Woody, LW Wright, J Wu, W Xie, N Xu, K Yagi, R Yamamoto, Y Yang, S Yokkaichi, Y Yokota, S Yoneyama, GR Young, IE Yushmanov, WA Zajc, C Zhang, L Zhang, Z Zhang, S Zhou

      NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT499 ( 2-3 ) 469 - 479   3 2003

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER  

      The PHENIX detector is designed to perform a broad study of A-A, p-A, and p-p collisions to investigate nuclear matter under extreme conditions. A wide variety of probes, sensitive to all timescales, are used to study systematic variations with species and energy as well as to measure the spin structure of the nucleon. Designing for the needs of the heavy-ion and polarized-proton programs has produced a detector with unparalleled capabilities. PHENIX measures electron and muon pairs, photons, and hadrons with excellent energy and momentum resolution. The detector consists of a large number of subsystems that are discussed in other papers in this volume. The overall design parameters of the detector are presented. (C) 2002 Elsevier Science B.V. All rights reserved.

      DOI: 10.1016/S0168-9002(02)01950-2

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    • PHENIX Muon Arms

      H Akikawa, A Al-Jamel, JB Archuleta, Archuleta, JR, R Armendariz, Armijo, V, TC Awes, A Baldisseri, AB Barker, PD Barnes, B Bassalleck, S Batsouli, J Behrendt, FG Bellaiche, AW Bland, M Bobrek, JG Boissevain, H Borel, ML Brooks, AW Brown, DS Brown, N Bruner, MM Cafferty, TA Carey, JS Chai, LL Chavez, S Chollet, RK Choudhury, MS Chung, Cianciolo, V, DJ Clark, Y Cobigo, CM Dabrowski, A Debraine, J DeMoss, BV Dinesh, JL Drachenberg, O Drapier, MA Echave, YV Efremenko, H En'yo, DE Fields, F Fleuret, J Fried, E Fujisawa, H Funahashi, S Gadrat, F Gastaldi, TF Gee, A Glenn, G Gogiberidze, M Gonin, J Gosset, Y Goto, RG de Cassagnac, RH Hance, GW Hart, N Hayashi, S Held, JS Hicks, JC Hill, R Hoade, B Hong, A Hoover, T Horaguchi, CT Hunter, DE Hurst, T Ichihara, K Imai, LD Isenhower, LD Isenhower, M Ishihara, WY Jang, J Johnson, D Jouan, N Kamihara, Y Kamyshkov, JH Kang, SS Kapoor, DJ Kim, DW Kim, GB Kim, WW Kinnison, S Klinksiek, L Kluberg, H Kobayashi, D Koehler, L Kotchenda, CH Kuberg, K Kurita, MJ Kweon, Y Kwon, GS Kyle, JJ LaBounty, JG Lajoie, DM Lee, S Lee, M Leitch, Z Li, MX Liu, Liu, X, Y Liu, E Lockner, JD Lopez, Y Mao, XB Martinez, MC McCain, PL McGaughey, S Mioduszewski, RE Mischke, AK Mohanty, BC Montoya, JM Moss, J Murata, MM Murray, JL Nagle, Y Nakada, J Newby, F Obenshain, APT Palounek, Papavassiliou, V, SF Pate, F Plasil, K Pope, JM Qualls, G Rao, KF Read, SH Robinson, G Roche, A Romana, P Rosnet, R Roth, N Saito, T Sakuma, WF Sandhoff, L Sanfratello, HD Sato, R Savino, M Sekimoto, MR Shaw, TA Shibata, KS Sim, HD Skank, DE Smith, GD Smith, WE Sondheim, S Sorensen, F Staley, PW Stankus, S Steffens, EM Stein, M Stepanov, W Stokes, M Sugioka, Z Sun, A Taketani, E Taniguchi, JD Tepe, GW Thornton, W Tian, J Tojo, H Torii, RS Towell, J Tradeski, M Vassent, C Velissaris, L Villatte, Y Wan, Y Watanabe, LC Watkins, BR Whitus, C Williams, PS Willis, BG Wong-Swanson, Y Yang, S Yoneyama, GR Young, S Zhou

      NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT499 ( 2-3 ) 537 - 548   3 2003

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE BV  

      The PHENIX Muon Arms detect muons at rapidities of \y\ = (1.2-2.4) with full azimuthal acceptance. Each muon arm must track and identify muons and provide good rejection of pions and kaons (similar to 10(-3)). In order to accomplish this we employ a radial field magnetic spectrometer with precision tracking (Muon Tracker) followed by a stack of absorber/low resolution tracking layers (Muon Identifier). The design, construction, testing and expected run parameters of both the muon tracker and the muon identifier are described. (C) 2002 Elsevier Science B.V. All rights reserved.

      DOI: 10.1016/S0168-9002(02)01955-1

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    • Proton inelastic scattering by ^<30>Na

      Hasegawa H., Motobayashi T., Kunibu M., Yanagisawa Y., Nakamura T., Notani M., Gomi T., Sugimoto T., Baba H., Saito A., Mizoi Y., Kannno S., Kurita K., Iwasaki H., Takesbita E., Takeshita E., Demichi K., Michimasa S., Ue K., Fukuda N., Iwasa N., Kurokawa M., Shimoura S., Sakurai H., Ishihara M.

      Meeting Abstracts of the Physical Society of Japan58.1.1   45   2003

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      Language:Japanese   Publisher:The Physical Society of Japan  

      DOI: 10.11316/jpsgaiyo.58.1.1.0_45_4

      CiNii Article

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    • RHIC pC CNI polarimeter: Status and performance from the first collider run

      O Jinnouchi, IG Alekseev, LC Bland, A Bravar, G Bunce, R Cadman, A Deshpande, S Dhawan, DE Fields, H Huang, Hughes, V, G Igo, K Imai, VP Kanavets, J Kiryluk, K Kurita, Z Li, W Lozowski, WW MacKay, Y Makdisi, A Ogawa, S Rescia, T Roser, N Saito, H Spinka, B Surrow, DN Svirida, J Tojo, D Underwood, J Wood

      SPIN 2002675   817 - 825   2003

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      Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:AMER INST PHYSICS  

      Polarimeters using the proton carbon elastic scattering process in Coulomb Nuclear Interference (CNI) region were installed in two RHIC rings. Polarization measurements were successfully carried out with the high energy polarized proton beams for the first polarized pp collision run. The physics principles, performance, and polarization measurements are presented.

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    • POLARIZED PROTON COLLIDER AT RHIC.

      栗田 和好

      Nucl.Instrum.Meth.A499:   392 - 414   1 1 2003

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      Language:English   Publishing type:Research paper (other academic)  

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    • PHENIX CENTRAL ARM PARTICLE ID DETECTORS.

      栗田 和好

      PHENIX Collaboration Nucl.Instrum.Meth.A499:   508 - 520   1 1 2003

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    • PHENIX ON-LINE SYSTEMS.

      栗田 和好

      PHENIX Collaboration Nucl.Instrum.Meth.A499:   560 - 592   1 1 2003

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    • MID-RAPIDITY NEUTRAL PION PRODUCTION IN PROTON PROTON COLLISIONS AT S**(1/2) = 200-GEV.

      栗田 和好

      Phys.Rev.Lett.91:   241803   1 1 2003

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    • System, centrality, and transverse mass dependence of two-pion correlation radii in heavy ion collisions at 11.6A and 14.6A GeV/c

      L Ahle, Y Akiba, K Ashktorab, MD Baker, D Beavis, P Beery, HC Britt, B Budick, J Chang, C Chasman, Z Chen, CY Chi, YY Chu, Cianciolo, V, BA Cole, JB Costales, HJ Crawford, JB Cumming, R Debbe, JC Dunlop, W Eldredge, J Engelage, SY Fung, E Garcia, M Gonin, S Gushue, H Hamagaki, LF Hansen, RS Hayano, S Hayashi, G Heintzelman, S Homma, E Judd, H Kaneko, J Kang, S Kaufman, WL Kehoe, EJ Kim, A Kumagai, K Kurita, RJ Ledoux, JH Lee, MJ LeVine, J Luke, Y Miake, A Mignerey, DP Morrison, RJ Morse, B Moskowitz, M Moulson, C Muntz, S Nagamiya, MN Namboodiri, TK Nayak, CA Ogilvie, J Olness, CG Parsons, LP Remsberg, D Roehrich, P Rothschild, H Sako, H Sakurai, TC Sangster, R Seto, J Shea, K Shigaki, RA Soltz, P Stankus, SG Steadman, GSF Stephans, TW Sung, Y Tanaka, MJ Tannenbaum, JH Thomas, Tonse, SR, S Ueno-Hayashi, JH van Dijk, F Videbaek, O Vossnack, Vutsadakis, V, F Wang, Y Wang, HE Wegner, D Woodruff, Y Wu, H Xiang, GH Xu, K Yagi, Yang, X, H Yao, D Zachary, WA Zajc, F Zhu

      PHYSICAL REVIEW C66 ( 5 ) 54906   11 2002

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMERICAN PHYSICAL SOC  

      Two-pion correlation functions are analyzed at midrapidity for three systems (14.6A GeV/c Si+Al, Si+Au, and 11.6A GeV/c Au+Au), seven distinct centrality conditions, and different k(T) bins in the range 0.1-0.5 GeV/c. Source reference frames are determined from fits to the Yano-Koonin source parametrization. Bertsch-Pratt radius parameters are shown to scale linearly with both number of projectile and total participants as obtained from a Glauber model calculation. A finite lifetime parameter that increases linearly with system/centrality is also reported. The m(T) dependences of the Bertsch-Pratt radii for the central Si+Au and central Au+Au systems differ only by an overall normalization factor given by the measured system/centrality dependence.

      DOI: 10.1103/PhysRevC.66.054906

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    • Flow measurements via two-particle azimuthal correlations in Au plus Au collisions at root S-NN=130 GeV

      K Adcox, SS Adler, NN Ajitanand, Y Akiba, J Alexander, L Aphecetche, Y Arai, SH Aronson, R Averbeck, TC Awes, KN Barish, PD Barnes, J Barrette, B Bassalleck, S Bathe, Baublis, V, A Bazilevsky, S Belikov, FG Bellaiche, ST Belyaev, MJ Bennett, Y Berdnikov, S Botelho, ML Brooks, DS Brown, N Bruner, D Bucher, H Buesching, Bumazhnov, V, G Bunce, J Burward-Hoy, S Butsyk, TA Carey, P Chand, J Chang, WC Chang, LL Chavez, S Chernichenko, CY Chi, J Chiba, M Chiu, RK Choudhury, T Christ, T Chujo, MS Chung, P Chung, Cianciolo, V, BA Cole, DG D'Enterria, G David, H Delagrange, A Denisov, A Deshpande, EJ Desmond, O Dietzsch, BV Dinesh, A Drees, A Durum, D Dutta, K Ebisu, YV Efremenko, K El Chenawi, H En'yo, S Esumi, L Ewell, T Ferdousi, DE Fields, SL Fokin, Z Fraenkel, A Franz, AD Frawley, SY Fung, S Garpman, TK Ghosh, A Glenn, AL Godoi, Y Goto, SV Greene, MG Perdekamp, SK Gupta, W Guryn, HA Gustafsson, JS Haggerty, H Hamagaki, AG Hansen, H Hara, EP Hartouni, R Hayano, N Hayashi, He, X, TK Hemmick, JM Heuser, M Hibino, JC Hill, DS Ho, K Homma, B Hong, A Hoover, T Ichihara, K Imai, MS Ippolitov, M Ishihara, BV Jacak, WY Jang, J Jia, BM Johnson, SC Johnson, KS Joo, S Kametani, JH Kang, M Kann, SS Kapoor, S Kelly, B Khachaturov, A Khanzadeev, J Kikuchi, DJ Kim, HJ Kim, SY Kim, YG Kim, WW Kinnison, E Kistenev, A Kiyomichi, C Klein-Boesing, S Klinksiek, L Kochenda, Kochetkov, V, D Koehler, T Kohama, D Kotchetkov, A Kozlov, PJ Kroon, K Kurita, MJ Kweon, Y Kwon, GS Kyle, R Lacey, JG Lajoie, J Lauret, A Lebedev, DM Lee, MJ Leitch, XH Li, Z Li, DJ Lim, MX Liu, Liu, X, Z Liu, CF Maguire, J Mahon, YI Makdisi, Manko, VI, Y Mao, SK Mark, S Markacs, G Martinez, MD Marx, A Masaike, F Matathias, T Matsumoto, PL McGaughey, E Melnikov, M Merschmeyer, F Messer, M Messer, Y Miake, TE Miller, A Milov, S Mioduszewski, RE Mischke, GC Mishra, JT Mitchell, AK Mohanty, DP Morrison, JM Moss, F Muhlbacher, M Muniruzzaman, J Murata, S Nagamiya, Y Nagasaka, JL Nagle, Y Nakada, BK Nandi, J Newby, L Nikkinen, P Nilsson, S Nishimura, AS Nyanin, J Nystrand, E O'Brien, CA Ogilvie, H Ohnishi, ID Ojha, M Ono, Onuchin, V, A Oskarsson, L Osterman, Otterlund, I, K Oyama, L Paffrath, APT Palounek, VS Pantuev, Papavassiliou, V, SF Pate, T Peitzmann, AN Petridis, C Pinkenburg, RP Pisani, P Pitukhin, F Plasil, M Pollack, K Pope, ML Purschke, Ravinovich, I, KF Read, K Reygers, Riabov, V, Y Riabov, M Rosati, AA Rose, SS Ryu, N Saito, A Sakaguchi, T Sakaguchi, H Sako, T Sakuma, Samsonov, V, TC Sangster, R Santo, HD Sato, S Sato, S Sawada, BR Schlei, Y Schutz, Semenov, V, R Seto, TK Shea, Shein, I, TA Shibata, K Shigaki, T Shiina, YH Shin, IG Sibiriak, D Silvermyr, KS Sim, J Simon-Gillo, CP Singh, Singh, V, M Sivertz, A Soldatov, RA Soltz, S Sorensen, PW Stankus, N Starinsky, P Steinberg, E Stenlund, A Ster, SP Stoll, M Sugioka, T Sugitate, JP Sullivan, Y Sumi, Z Sun, M Suzuki, EM Takagui, A Taketani, M Tamai, KH Tanaka, Y Tanaka, E Taniguchi, MJ Tannenbaum, J Thomas, JH Thomas, TL Thomas, W Tian, J Tojo, H Torii, RS Towell, Tserruya, I, H Tsuruoka, AA Tsvetkov, SK Tuli, H Tydesjo, N Tyurin, T Ushiroda, HW van Hecke, C Velissaris, J Velkovska, M Velkovsky, AA Vinogradov, MA Volkov, A Vorobyov, E Vznuzdaev, H Wang, Y Watanabe, SN White, C Witzig, FK Wohn, CL Woody, W Xie, K Yagi, S Yokkaichi, GR Young, IE Yushmanov, WA Zajc, Z Zhang, S Zhou

      PHYSICAL REVIEW LETTERS89 ( 21 ) 212301   11 2002

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER PHYSICAL SOC  

      Two-particle azimuthal correlation functions are presented for charged hadrons produced in Au + Au collisions at the Relativistic Heavy Ion Collider (roots(NN) = 130 GeV). The measurements permit determination of elliptic flow without event-by-event estimation of the reaction plane. The extracted elliptic flow values (upsilon(2)) show significant sensitivity to both the collision centrality and the transverse momenta of emitted hadrons, suggesting rapid thermalization and relatively strong velocity fields. When scaled by the eccentricity of the collision zone epsilon, the scaled elliptic flow shows little or no dependence on centrality for charged hadrons with relatively low p(T). A breakdown of this epsilon scaling is observed for charged hadrons with p(T) &gt; 1.0 GeV/c.

      DOI: 10.1103/PhysRevLett.89.212301

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    • Net charge fluctuations in Au + Au interactions at √SNN = 130 GeV

      K. Adcox, S. S. Adler, N. N. Ajitanand, Y. Akiba, J. Alexander, L. Aphecetche, Y. Arai, S. H. Aronson, R. Averbeck, T. C. Awes, K. N. Barish, P. D. Barnes, J. Barrette, B. Bassalleck, S. Bathe, V. Baublis, A. Bazilevsky, S. Belikov, F. G. Bellaiche, S. T. Belyaev, M. J. Bennett, Y. Berdnikov, S. Botelho, M. L. Brooks, D. S. Brown, N. Bruner, D. Bucher, H. Buesching, V. Bumazhnov, G. Bunce, J. Burward-Hoy, S. Butsyk, T. A. Carey, P. Chand, J. Chang, W. C. Chang, L. L. Chavez, S. Chernichenko, C. Y. Chi, J. Chiba, M. Chiu, R. K. Choudhury, T. Christ, T. Chujo, M. S. Chung, P. Chung, V. Cianciolo, B. A. Cole, D. G. D'Enterria, G. David, H. Delagrange, A. Denisov, A. Deshpande, E. J. Desmond, O. Dietzsch, B. V. Dinesh, A. Drees, A. Durum, D. Dutta, K. Ebisu, Y. V. Efremenko, K. El Chenawi, H. En'yo, S. Esumi, L. Ewell, T. Ferdousi, D. E. Fields, S. L. Fokin, Z. Fraenkel, A. Franz, A. D. Frawley, S. Y. Fung, S. Garpman, T. K. Ghosh, A. Glenn, A. L. Godoi, Y. Goto, S. V. Greene, M. Grosse Perdekamp, S. K. Gupta, W. Guryn, H. A. Gustafsson, J. S. Haggerty, H. Hamagaki, A. G. Hansen, H. Hara, E. P. Hartouni, R. Hayano, N. Hayashi, X. He, T. K. Hemmick, J. M. Heuser, M. Hibino, J. C. Hill, D. S. Ho, K. Homma, B. Hong, A. Hoover, T. Ichihara, K. Imai, M. S. Ippolitov, M. Ishihara, B. V. Jacak, W. Y. Jang, J. Jia, B. M. Johnson, S. C. Johnson, K. S. Joo, S. Kametani, J. H. Kang, M. Kann, S. S. Kapoor, S. Kelly, B. Khachaturov, A. Khanzadeev, J. Kikuchi, D. J. Kim, H. J. Kim, S. Y. Kim, Y. G. Kim, W. W. Kinnison, E. Kistenev, A. Kiyomichi, C. Klein-Boesing, S. Klinksiek, L. Kochenda, V. Kochetkov, D. Koehler, T. Kohama, D. Kotchetkov, A. Kozlov, P. J. Kroon, K. Kurita, M. J. Kweon, Y. Kwon, G. S. Kyle, R. Lacey, J. G. Lajoie, J. Lauret, A. Lebedev, D. M. Lee, M. J. Leitch, X. H. Li, Z. Li, D. J. Lim, M. X. Liu, X. Liu, Z. Liu, C. F. Maguire, J. Mahon, Y. I. Makdisi, V. I. Manko, Y. Mao, S. K. Mark, S. Markacs, G. Martinez, M. D. Marx, A. Masaike, F. Matathias, T. Matsumoto, P. L. McGaughey, E. Melnikov, M. Merschmeyer, F. Messer, M. Messer, Y. Miake, T. E. Miller, A. Milov, S. Mioduszewski, R. E. Mischke, G. C. Mishra, J. T. Mitchell, A. K. Mohanty, D. P. Morrison, J. M. Moss, F. Mühlbacher, M. Muniruzzaman, J. Murata, S. Nagamiya, Y. Nagasaka, J. L. Nagle, Y. Nakada, B. K. Nandi, J. Newby, L. Nikkinen, P. Nilsson, S. Nishimura, A. S. Nyanin, J. Nystrand, E. O'Brien, C. A. Ogilvie, H. Ohnishi, I. D. Ojha, M. Ono, V. Onuchin, A. Oskarsson, L. Österman, I. Otterlund, K. Oyama, L. Paffrath, A. P.T. Palounek, V. S. Pantuev, V. Papavassiliou, S. F. Pate, T. Peitzmann, A. N. Petridis, C. Pinkenburg, R. P. Pisani, P. Pitukhin, F. Plasil, M. Pollack, K. Pope, M. L. Purschke, I. Ravinovich, K. F. Read, K. Reygers, V. Riabov, Y. Riabov, M. Rosati, A. A. Rose, S. S. Ryu, N. Saito, A. Sakaguchi, T. Sakaguchi, H. Sako, T. Sakuma, V. Samsonov, T. C. Sangster, R. Santo, H. D. Sato, S. Sato, S. Sawada, B. R. Schlei, Y. Schutz, V. Semenov, R. Seto, T. K. Shea, I. Shein, T. A. Shibata, K. Shigaki, T. Shiina, Y. H. Shin, I. G. Sibiriak, D. Silvermyr, K. S. Sim, J. Simon-Gillo, C. P. Singh, V. Singh, M. Sivertz, A. Soldatov, R. A. Soltz, S. Sorensen, P. W. Stankus, N. Starinsky, P. Steinberg, E. Stenlund, A. Ster, S. P. Stoll, M. Sugioka, T. Sugitate, J. P. Sullivan, Y. Sumi, Z. Sun, M. Suzuki, E. M. Takagui, A. Taketani, M. Tamai, K. H. Tanaka, Y. Tanaka, E. Taniguchi, M. J. Tannenbaum, J. Thomas, J. H. Thomas, T. L. Thomas, W. Tian, J. Tojo, H. Torii, R. S. Towell, I. Tserruya, H. Tsuruoka, A. A. Tsvetkov, S. K. Tuli, H. Tydesjö, N. Tyurin, T. Ushiroda, H. W. van Hecke, C. Velissaris, J. Velkovska, M. Velkovsky, A. A. Vinogradov, M. A. Volkov, A. Vorobyov, E. Vznuzdaev, H. Wang, Y. Watanabe, S. N. White, C. Witzig, F. K. Wohn, C. L. Woody, W. Xie, K. Yagi, S. Yokkaichi, G. R. Young, I. E. Yushmanov, W. A. Zajc, Z. Zhang, S. Zhou

      Physical Review Letters89 ( 8 ) 082301/6   19 8 2002

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Physical Society  

      The results from an analysis of net charge fluctuations for particles produced in Au+Au interactions at √sNN=130 GeV. The fluctuations are studied in the variables R=n+/n-, the ratio between positive and negative particles, and Q=n+-n-, the net charge. This paper discusses the advantages and disadvantages of these variables.

      DOI: 10.1103/PhysRevLett.89.082301

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    • Measurement of Lambda and (Lambda)over-bar particles in Au plus Au collisions at root s(NN)=130 GeV

      K Adcox, SS Adler, NN Ajitanand, Y Akiba, J Alexander, L Aphecetche, Y Arai, SH Aronson, R Averbeck, TC Awes, KN Barish, PD Barnes, J Barrette, B Bassalleck, S Bathe, Baublis, V, A Bazilevsky, S Belikov, FG Bellaiche, ST Belyaev, MJ Bennett, Y Berdnikov, S Botelho, ML Brooks, DS Brown, N Bruner, D Bucher, H Buesching, Bumazhnov, V, G Bunce, J Burward-Hoy, S Butsyk, TA Carey, P Chand, J Chang, WC Chang, LL Chavez, S Chernichenko, CY Chi, J Chiba, M Chiu, RK Choudhury, T Christ, T Chujo, MS Chung, P Chung, Cianciolo, V, BA Cole, DG D'Enterria, G David, H Delagrange, A Denisov, A Deshpande, EJ Desmond, O Dietzsch, BV Dinesh, A Drees, A Durum, D Dutta, K Ebisu, YV Efremenko, K El Chenawi, H En'yo, S Esumi, L Ewell, T Ferdousi, DE Fields, SL Fokin, Z Fraenkel, A Franz, AD Frawley, SY Fung, S Garpman, TK Ghosh, A Glenn, AL Godoi, Y Goto, SV Greene, MG Perdekamp, SK Gupta, W Guryn, HA Gustafsson, JS Haggerty, H Hamagaki, AG Hansen, H Hara, EP Hartouni, R Hayano, N Hayashi, He, X, TK Hemmick, JM Heuser, M Hibino, JC Hill, DS Ho, K Homma, B Hong, A Hoover, T Ichihara, K Imai, MS Ippolitov, M Ishihara, BV Jacak, WY Jang, J Jia, BM Johnson, SC Johnson, KS Joo, S Kametani, JH Kang, M Kann, SS Kapoor, S Kelly, B Khachaturov, A Khanzadeev, J Kikuchi, DJ Kim, HJ Kim, SY Kim, YG Kim, WW Kinnison, E Kistenev, A Kiyomichi, C Klein-Boesing, S Klinksiek, L Kochenda, Kochetkov, V, D Koehler, T Kohama, D Kotchetkov, A Kozlov, PJ Kroon, K Kurita, MJ Kweon, Y Kwon, GS Kyle, R Lacey, JG Lajoie, J Lauret, A Lebedev, DM Lee, MJ Leitch, XH Li, Z Li, DJ Lim, MX Liu, Liu, X, Z Liu, CF Maguire, J Mahon, YI Makdisi, Manko, VI, Y Mao, SK Mark, S Markacs, G Martinez, MD Marx, A Masaike, F Matathias, T Matsumoto, PL McGaughey, E Melnikov, M Merschmeyer, F Messer, M Messer, Y Miake, TE Miller, A Milov, S Mioduszewski, RE Mischke, GC Mishra, JT Mitchell, AK Mohanty, DP Morrison, JM Moss, F Muhlbacher, D Mukhopadhyay, M Muniruzzaman, J Murata, S Nagamiya, Y Nagasaka, JL Nagle, Y Nakada, BK Nandi, J Newby, L Nikkinen, P Nilsson, S Nishimura, AS Nyanin, J Nystrand, E O'Brien, CA Ogilvie, H Ohnishi, ID Ojha, M Ono, Onuchin, V, A Oskarsson, L Osterman, Otterlund, I, K Oyama, L Paffrath, D Pal, APT Palounek, VS Pantuev, Papavassiliou, V, SF Pate, T Peitzmann, AN Petridis, C Pinkenburg, RP Pisani, P Pitukhin, F Plasil, M Pollack, K Pope, ML Purschke, Ravinovich, I, KF Read, K Reygers, Riabov, V, Y Riabov, M Rosati, AA Rose, SS Ryu, N Saito, A Sakaguchi, T Sakaguchi, H Sako, T Sakuma, Samsonov, V, TC Sangster, R Santo, HD Sato, S Sato, S Sawada, BR Schlei, Y Schutz, Semenov, V, R Seto, TK Shea, Shein, I, TA Shibata, K Shigaki, T Shiina, YH Shin, IG Sibiriak, D Silvermyr, KS Sim, J Simon-Gillo, CP Singh, Singh, V, M Sivertz, A Soldatov, RA Soltz, S Sorensen, PW Stankus, N Starinsky, P Steinberg, E Stenlund, A Ster, SP Stoll, M Sugioka, T Sugitate, JP Sullivan, Y Sumi, Z Sun, M Suzuki, EM Takagui, A Taketani, M Tamai, KH Tanaka, Y Tanaka, E Taniguchi, MJ Tannenbaum, J Thomas, JH Thomas, TL Thomas, W Tian, J Tojo, H Torii, RS Towell, Tserruya, I, H Tsuruoka, AA Tsvetkov, SK Tuli, H Tydesjo, N Tyurin, T Ushiroda, HW van Hecke, C Velissaris, J Velkovska, M Velkovsky, AA Vinogradov, MA Volkov, A Vorobyov, E Vznuzdaev, H Wang, Y Watanabe, SN White, C Witzig, FK Wohn, CL Woody, W Xie, K Yagi, S Yokkaichi, GR Young, IE Yushmanov, WA Zajc, Z Zhang, S Zhou, S Zhou

      PHYSICAL REVIEW LETTERS89 ( 9 ) 92302   8 2002

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER PHYSICAL SOC  

      We present results on the measurement of Lambda and (Lambda) over bar production in Au+Au collisions at roots(NN)=130 GeV with the PHENIX detector at the Relativistic Heavy Ion Collider. The transverse momentum spectra were measured for minimum bias and for the 5% most central events. The (Lambda) over bar/Lambda ratios are constant as a function of p(T) and the number of participants. The measured net Lambda density is significantly larger than predicted by models based on hadronic strings (e.g., HIJING) but in approximate agreement with models which include the gluon-junction mechanism.

      DOI: 10.1103/PhysRevLett.89.092302

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    • Measurement of analyzing power for proton-carbon elastic scattering in the Coulomb-nuclear interference region with a 22-GeV/c polarized proton beam

      J. Tojo, I. Alekseev, M. Bai, B. Bassalleck, G. Bunce, G. Bunce, A. Deshpande, J. Doskow, S. Eilerts, D. E. Fields, D. E. Fields, Y. Goto, Y. Goto, H. Huang, V. Hughes, K. Imai, M. Ishihara, M. Ishihara, V. Kanavets, K. Kurita, K. Kwiatkowski, B. Lewis, W. Lozowski, Y. Makdisi, H. O. Meyer, B. V. Morozov, M. Nakamura, B. Przewoski, T. Rinckel, T. Roser, A. Rusek, N. Saito, N. Saito, B. Smith, D. Svirida, M. Syphers, A. Taketani, A. Taketani, T. L. Thomas, D. Underwood, D. Wolfe, K. Yamamoto, L. Zhu

      Physical Review Letters89 ( 5 ) 052302/1 - 052302/4   29 7 2002

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      The analyzing power (AN) for pC elastic scattering in the Coulomb-nuclear interference (CNI) region of 9.0×10-3&lt
      -t&lt
      4.1×10-2 (GeV/c)2 at 21.7 GeV/c with high statistical precision was measured. A nonzero value for r5 was obtained from AN to be Rer5=0.088±0.058 and Imr5=-0.161±0.226.

      DOI: 10.1103/PhysRevLett.89.052302

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    • Measurement of single electrons and implications for charm production in Au+Au collisions at root(NN)-N-S=130 GeV

      K Adcox, SS Adler, NN Ajitanand, Y Akiba, J Alexander, L Aphecetche, Y Arai, SH Aronson, R Averbeck, TC Awes, KN Barish, PD Barnes, J Barrette, B Bassalleck, S Bathe, Baublis, V, A Bazilevsky, S Belikov, FG Bellaiche, ST Belyaev, MJ Bennett, Y Berdnikov, S Botelho, ML Brooks, DS Brown, N Bruner, D Bucher, H Buesching, Bumazhnov, V, G Bunce, J Burward-Hoy, S Butsyk, TA Carey, P Chand, J Chang, WC Chang, LL Chavez, S Chernichenko, CY Chi, J Chiba, M Chiu, RK Choudhury, T Christ, T Chujo, MS Chung, P Chung, Cianciolo, V, BA Cole, DG D'Enterria, G David, H Delagrange, A Denisov, A Deshpande, EJ Desmond, O Dietzsch, BV Dinesh, A Drees, A Durum, D Dutta, K Ebisu, YV Efremenko, K El Chenawi, H En'yo, S Esumi, L Ewell, T Ferdousi, DE Fields, SL Fokin, Z Fraenkel, A Franz, AD Frawley, SY Fung, S Garpman, TK Ghosh, A Glenn, AL Godoi, Y Goto, SV Greene, MG Perdekamp, SK Gupta, W Guryn, HA Gustafsson, T Hachiya, JS Haggerty, H Hamagaki, AG Hansen, H Hara, EP Hartouni, R Hayano, N Hayashi, He, X, TK Hemmick, JM Heuser, M Hibino, JC Hill, DS Ho, K Homma, B Hong, A Hoover, T Ichihara, K Imai, MS Ippolitov, M Ishihara, BV Jacak, WY Jang, J Jia, BM Johnson, SC Johnson, KS Joo, S Kametani, JH Kang, M Kann, SS Kapoor, S Kelly, B Khachaturov, A Khanzadeev, J Kikuchi, DJ Kim, HJ Kim, SY Kim, YG Kim, WW Kinnison, E Kistenev, A Kiyomichi, C Klein-Boesing, S Klinksiek, L Kochenda, Kochetkov, V, D Koehler, T Kohama, D Kotchetkov, A Kozlov, PJ Kroon, K Kurita, MJ Kweon, Y Kwon, GS Kyle, R Lacey, JG Lajoie, J Lauret, A Lebedev, DM Lee, MJ Leitch, XH Li, Z Li, DJ Lim, MX Liu, Liu, X, Z Liu, CF Maguire, J Mahon, YI Makdisi, Manko, VI, Y Mao, SK Mark, S Markacs, G Martinez, MD Marx, A Masaike, F Matathias, T Matsumoto, PL McGaughey, E Melnikov, M Merschmeyer, F Messer, M Messer, Y Miake, TE Miller, A Milov, S Mioduszewski, RE Mischke, GC Mishra, JT Mitchell, AK Mohanty, DP Morrison, JM Moss, F Muhlbacher, M Muniruzzaman, J Murata, S Nagamiya, Y Nagasaka, JL Nagle, Y Nakada, BK Nandi, J Newby, L Nikkinen, P Nilsson, S Nishimura, AS Nyanin, J Nystrand, E O'Brien, CA Ogilvie, H Ohnishi, ID Ojha, M Ono, Onuchin, V, A Oskarsson, L Osterman, Otterlund, I, K Oyama, L Paffrath, APT Palounek, VS Pantuev, Papavassiliou, V, SF Pate, T Peitzmann, AN Petridis, C Pinkenburg, RP Pisani, P Pitukhin, F Plasil, M Pollack, K Pope, ML Purschke, Ravinovich, I, KF Read, K Reygers, Riabov, V, Y Riabov, M Rosati, AA Rose, SS Ryu, N Saito, A Sakaguchi, T Sakaguchi, H Sako, T Sakuma, Samsonov, V, TC Sangster, R Santo, HD Sato, S Sato, S Sawada, BR Schlei, Y Schutz, Semenov, V, R Seto, TK Shea, Shein, I, TA Shibata, K Shigaki, T Shiina, YH Shin, IG Sibiriak, D Silvermyr, KS Sim, J Simon-Gillo, CP Singh, Singh, V, M Sivertz, A Soldatov, RA Soltz, S Sorensen, PW Stankus, N Starinsky, P Steinberg, E Stenlund, A Ster, SP Stoll, M Sugioka, T Sugitate, JP Sullivan, Y Sumi, Z Sun, M Suzuki, EM Takagui, A Taketani, M Tamai, KH Tanaka, Y Tanaka, E Taniguchi, MJ Tannenbaum, J Thomas, JH Thomas, TL Thomas, W Tian, J Tojo, H Torii, RS Towell, Tserruya, I, H Tsuruoka, AA Tsvetkov, SK Tuli, H Tydesjo, N Tyurin, T Ushiroda, HW van Hecke, C Velissaris, J Velkovska, M Velkovsky, AA Vinogradov, MA Volkov, A Vorobyov, E Vznuzdaev, H Wang, Y Watanabe, SN White, C Witzig, FK Wohn, CL Woody, W Xie, K Yagi, S Yokkaichi, GR Young, IE Yushmanov, WA Zajc, Z Zhang, S Zhou

      PHYSICAL REVIEW LETTERS88 ( 19 ) 192303   5 2002

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER PHYSICAL SOC  

      Transverse momentum spectra of electrons from Au+Au collisions at roots(NN) = 130 GeV have been measured at midrapidity by the PHENIX experiment at the Relativistic Heavy Ion Collider. The spectra show an excess above the background from photon conversions and light hadron decays. The electron signal is consistent with that expected from semileptonic decays of charm. The yield of the electron signal dN(e)/dy for p(T) > 0.8 GeV/c is 0.025 +/- 0.004(stat) +/- 0.010( syst) in central collisions, and the corresponding charm cross section is 380 +/- 60(stat) +/- 200(syst ) mub per binary nucleon-nucleon collision.

      DOI: 10.1103/PhysRevLett.88.192303

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    • Proton Carbon CNI Polarimeter for RHIC

      栗田 和好

      Nucl.Phys.Proc.Suppl.105:   164 - 167   1 1 2002

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    • Suppression of hadrons with large transverse momentum in central Au+Au collisions at root s(NN)=130 GeV

      K Adcox, SS Adler, NN Ajitanand, Y Akiba, J Alexander, L Aphecetche, Y Arai, SH Aronson, R Averbeck, TC Awes, KN Barish, PD Barnes, J Barrette, B Bassalleck, S Bathe, Baublis, V, A Bazilevsky, S Belikov, FG Bellaiche, ST Belyaev, MJ Bennett, Y Berdnikov, S Botelho, ML Brooks, DS Brown, N Bruner, D Bucher, H Buesching, Bumazhnov, V, G Bunce, J Burward-Hoy, S Butsyk, TA Carey, R Chand, J Chang, WC Chang, LL Chavez, S Chernichenko, CY Chi, J Chiba, M Chiu, RK Choudhury, T Christ, T Chujo, MS Chung, P Chung, Cianciolo, V, BA Cole, DG D'Enterria, G David, H Delagrange, A Denisov, A Deshpande, EJ Desmond, O Dietzsch, BV Dinesh, A Drees, A Durum, D Dutta, K Ebisu, YV Efremenko, K El Chenawi, H En'yo, S Esumi, L Ewell, T Ferdousi, DE Fields, SL Fokin, Z Fraenkel, A Franz, AD Frawley, SY Fung, S Garpman, TK Ghosh, A Glenn, AL Godoi, Y Goto, SV Greene, MG Perdekamp, SK Gupta, W Guryn, HA Gustafsson, JS Haggerty, H Hamagaki, AG Hansen, H Hara, ER Hartouni, R Hayano, N Hayashi, He, X, TK Hemmick, JM Heuser, M Hibino, JC Hill, DS Ho, K Homma, B Hong, A Hoover, T Ichihara, K Imai, MS Ippolitov, M Ishihara, BV Jacak, WY Jang, J Jia, BM Johnson, SC Johnson, KS Joo, S Kametani, JH Kang, M Kann, SS Kapoor, S Kelly, B Khachaturov, A Khanzadeev, J Kikuchi, DJ Kim, HJ Kim, SY Kim, YG Kim, WW Kinnison, E Kistenev, A Kiyomichi, C Klein-Boesing, S Klinksiek, L Kochenda, Kochetkov, V, D Koehler, T Kohama, D Kotchetkov, A Kozlov, RJ Kroon, K Kurita, MJ Kweon, Y Kwon, GS Kyle, R Lacey, JG Lajoie, J Lauret, A Lebedev, DM Lee, MJ Leitch, XH Li, Z Li, DJ Lim, MX Liu, Liu, X, Z Liu, CF Maguire, J Mahon, YI Makdisi, Manko, VI, Y Mao, SK Mark, S Markacs, G Martinez, MD Marx, A Masaike, F Matathias, T Matsumoto, PL McGaughey, E Melnikov, M Merschmeyer, F Messer, M Messer, Y Miake, TE Miller, A Milov, S Mioduszewski, RE Mischke, GC Mishra, JT Mitchell, AK Mohanty, DP Morrison, JM Moss, F Muhlbacher, M Muniruzzaman, J Murata, S Nagamiya, Y Nagasaka, JL Nagle, Y Nakada, BK Nandi, J Newby, L Nikkinen, R Nilsson, S Nishimura, AS Nyanin, J Nystrand, E O'Brien, CA Ogilvie, H Ohnishi, ID Ojha, M Ono, Onuchin, V, A Oskarsson, L Osterman, Otterlund, I, K Oyama, L Paffrath, APT Palounek, VS Pantuev, Papavassiliou, V, SF Pate, T Peitzmann, AN Petridis, C Pinkenburg, RR Pisani, R Pitukhin, F Plasil, M Pollack, K Pope, ML Purschke, Ravinovich, I, KF Read, K Reygers, Riabov, V, Y Riabov, M Rosati, AA Rose, SS Ryu, N Saito, A Sakaguchi, T Sakaguchi, H Sako, T Sakuma, Samsonov, V, TC Sangster, R Santo, HD Sato, S Sato, S Sawada, BR Schlei, Y Schutz, Semenov, V, R Seto, TK Shea, Shein, I, TA Shibata, K Shigaki, T Shiina, YH Shin, IG Sibiriak, D Silvermyr, KS Sim, J Simon-Gillo, CP Singh, Singh, V, M Sivertz, A Soldatov, RA Soltz, S Sorensen, PW Stankus, N Starinsky, R Steinberg, E Stenlund, A Ster, SP Stoll, M Sugioka, T Sugitate, JP Sullivan, Y Sumi, Z Sun, M Suzuki, EM Takagui, A Taketani, M Tamai, KH Tanaka, Y Tanaka, E Taniguchi, MJ Tannenbaum, J Thomas, JH Thomas, TL Thomas, W Tian, J Tojo, H Torii, RS Towell, Tserruya, I, H Tsuruoka, AA Tsvetkov, SK Tuli, H Tydesjo, N Tyurin, T Ushiroda, HW van Hecke, C Velissaris, J Velkovska, M Velkovsky, AA Vinogradov, MA Volkov, A Vorobyov, E Vznuzdaev, H Wang, Y Watanabe, SN White, C Witzig, FK Wohn, CL Woody, W Xie, K Yagi, S Yokkaichi, GR Young, IE Yushmanov, WA Zajc, Z Zhang, S Zhou

      PHYSICAL REVIEW LETTERS88 ( 2 ) 22301   1 2002

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      Transverse momentum spectra for charged hadrons and for neutral pions in the range 1 Gev/c &lt; P-T &lt; 5 GeV/c have been measured by the PHENIX experiment at RHIC in Au + Au collisions at rootS(NN) = 130 GeV. At high p(T) the spectra from peripheral nuclear collisions are consistent with scaling the spectra from p + p collisions by the average number of binary nucleon-nucleon collisions. The spectra from central collisions are significantly suppressed when compared to the binary-scaled p + p expectation, and also when compared to similarly binary-scaled peripheral collisions, indicating a novel nuclear-medium effect in central nuclear collisions at RHIC energies.

      DOI: 10.1103/PhysRevLett.88.022301

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    • Transverse Mass Dependence Of Two Pion Corrclations In Au+Au Collisions At S(NN)**(1/2)= 130-GeV.

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      Phys.Rev.Lett.88:   192302   1 1 2002

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    • Centrality Dependence Of Pi+ / Pi-,K+ / K-, P And Anti-P Production From S(Nn)**(1/2)= 13-=Gev Au+Au Collisions At RHIC.

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      Phys.Rev.Lett.   1 1 2002

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    • Systematics of midrapidity transverse energy distributions in limited apertures from p+Be to Au+Au collisions at relativistic energies (vol C 63 art. no. 064602, 2001)

      T Abbott, L Ahle, Y Akiba, D Alburger, D Beavis, L Birstein, MA Bloomer, PD Bond, HC Britt, B Budick, C Chasman, Z Chen, CY Chi, YY Chu, Cianciolo, V, BA Cole, JB Costales, HJ Crawford, JB Cumming, R Debbe, E Duek, J Engelage, SY Fung, M Gonin, L Grodzins, S Gushue, H Hamagaki, O Hansen, RS Hayano, S Hayashi, S Homma, HZ Huang, Y Ikeda, Juricic, I, H Kaneko, J Kang, S Katcoff, S Kaufman, WL Kehoe, K Kimura, K Kitamura, K Kurita, RJ Ledoux, MJ LeVine, Y Miake, DP Morrison, RJ Morse, B Moskowitz, S Nagamiya, MN Namboodiri, TK Nayak, J Olness, CG Parsons, LP Remsberg, P Rothschild, H Sakurai, TC Sangster, M Sarabura, R Seto, K Shigaki, A Shor, R Soltz, P Stankus, SG Steadman, GSF Stephans, T Sugitate, T Sung, M Tanaka, MJ Tannenbaum, J Thomas, S Tonse, M Torikoshi, S Ueno-Hayashi, JH van Dijk, F Videbaek, M Vient, P Vincent, O Vossnack, E Vulgaris, Vutsadakis, V, FQ Wang, Y Wang, WA Watson, HE Wegner, DS Woodruff, YD Wu, K Yagi, Yang, X, D Zachary, WA Zajc

      PHYSICAL REVIEW C64 ( 2 ) 64602   8 2001

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      Language:English   Publishing type:Research paper (other academic)   Publisher:AMERICAN PHYSICAL SOC  

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    • Systematics of midrapidity transverse energy distributions in limited apertures from p+Be to Au+Au collisions at relativistic energies (vol C 63 art. no. 064602, 2001)

      T Abbott, L Ahle, Y Akiba, D Alburger, D Beavis, L Birstein, MA Bloomer, PD Bond, HC Britt, B Budick, C Chasman, Z Chen, CY Chi, YY Chu, Cianciolo, V, BA Cole, JB Costales, HJ Crawford, JB Cumming, R Debbe, E Duek, J Engelage, SY Fung, M Gonin, L Grodzins, S Gushue, H Hamagaki, O Hansen, RS Hayano, S Hayashi, S Homma, HZ Huang, Y Ikeda, Juricic, I, H Kaneko, J Kang, S Katcoff, S Kaufman, WL Kehoe, K Kimura, K Kitamura, K Kurita, RJ Ledoux, MJ LeVine, Y Miake, DP Morrison, RJ Morse, B Moskowitz, S Nagamiya, MN Namboodiri, TK Nayak, J Olness, CG Parsons, LP Remsberg, P Rothschild, H Sakurai, TC Sangster, M Sarabura, R Seto, K Shigaki, A Shor, R Soltz, P Stankus, SG Steadman, GSF Stephans, T Sugitate, T Sung, M Tanaka, MJ Tannenbaum, J Thomas, S Tonse, M Torikoshi, S Ueno-Hayashi, JH van Dijk, F Videbaek, M Vient, P Vincent, O Vossnack, E Vulgaris, Vutsadakis, V, FQ Wang, Y Wang, WA Watson, HE Wegner, DS Woodruff, YD Wu, K Yagi, Yang, X, D Zachary, WA Zajc

      PHYSICAL REVIEW C64 ( 2 ) 64602   8 2001

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    • Measurement of the midrapidity transverse energy distribution from √sNN = 130GeV Au + Au collisions at RHIC

      K. Adcox, S. S. Adler, N. N. Ajitanand, Y. Akiba, J. Alexander, L. Aphecetche, Y. Arai, S. H. Aronson, R. Averbeck, T. C. Awes, K. N. Barish, P. D. Barnes, J. Barrette, B. Bassalleck, S. Bathe, V. Baublis, A. Bazilevsky, S. Belikov, F. G. Bellaiche, S. T. Belyaev, M. J. Bennett, Y. Berdnikov, S. Botelho, M. L. Brooks, D. S. Brown, N. Bruner, D. Bucher, H. Buesching, V. Bumazhnov, G. Bunce, J. Burward-Hoy, S. Butsyk, T. A. Carey, P. Chand, J. Chang, W. C. Chang, L. L. Chavez, S. Chernichenko, C. Y. Chi, J. Chiba, M. Chiu, R. K. Choudhury, T. Christ, T. Chujo, M. S. Chung, P. Chung, V. Cianciolo, B. A. Cole, D. G. D’Enterria, G. David, H. Delagrange, A. Denisov, A. Deshpande, E. J. Desmond, O. Dietzsch, B. V. Dinesh, A. Drees, A. Durum, D. Dutta, K. Ebisu, Y. V. Efremenko, K. El Chenawi, H. En’yo, S. Esumi, L. Ewell, T. Ferdousi, D. E. Fields, S. L. Fokin, Z. Fraenkel, A. Franz, A. D. Frawley, S. Y. Fung, S. Garpman, T. K. Ghosh, A. Glenn, A. L. Godoi, Y. Goto, S. V. Greene, M. Grosse Perdekamp, S. K. Gupta, W. Guryn, H. Gustafsson, J. S. Haggerty, H. Hamagaki, A. G. Hansen, H. Hara, E. P. Hartouni, R. Hayano, N. Hayashi, X. He, T. K. Hemmick, J. M. Heuser, M. Hibino, J. C. Hill, D. S. Ho, K. Homma, B. Hong, A. Hoover, T. Ichihara, K. Imai, M. S. Ippolitov, M. Ishihara, B. V. Jacak, W. Y. Jang, J. Jia, B. M. Johnson, S. C. Johnson, K. S. Joo, S. Kametani, J. H. Kang, M. Kann, S. S. Kapoor, S. Kelly, B. Khachaturov, A. Khanzadeev, J. Kikuchi, D. J. Kim, H. J. Kim, S. Y. Kim, Y. G. Kim, W. W. Kinnison, E. Kistenev, A. Kiyomichi, C. Klein-Boesing, S. Klinksiek, L. Kochenda, D. Kochetkov, V. Kochetkov, D. Koehler, T. Kohama, A. Kozlov, P. J. Kroon, K. Kurita, M. J. Kweon, Y. Kwon, G. S. Kyle, R. Lacey, J. G. Lajoie, J. Lauret, A. Lebedev, D. M. Lee, M. J. Leitch, X. H. Li, Z. Li, D. J. Lim, M. X. Liu, X. Liu, Z. Liu, C. F. Maguire, J. Mahon, Y. I. Makdisi, V. I. Manko, Y. Mao, S. K. Mark, S. Markacs, G. Martinez, M. D. Marx, A. Masaike, F. Matathias, T. Matsumoto, P. L. McGaughey, E. Melnikov, M. Merschmeyer, F. Messer, M. Messer, Y. Miake, T. E. Miller, A. Milov, S. Mioduszewski, R. E. Mischke, G. C. Mishra, J. T. Mitchell, A. K. Mohanty, D. P. Morrison, J. M. Moss, F. Mühlbacher, M. Muniruzzaman, J. Murata, S. Nagamiya, Y. Nagasaka, J. L. Nagle, Y. Nakada, B. K. Nandi, J. Newby, L. Nikkinen, P. Nilsson, S. Nishimura, A. S. Nyanin, J. Nystrand, E. O’Brien, C. A. Ogilvie, H. Ohnishi, I. D. Ojha, M. Ono, V. Onuchin, A. Oskarsson, L. österman, I. Otterlund, K. Oyama, L. Paffrath, A. P.T. Palounek, V. S. Pantuev, V. Papavassiliou, S. F. Pate, T. Peitzmann, A. N. Petridis, C. Pinkenburg, R. P. Pisani, P. Pitukhin, F. Plasil, M. Pollack, K. Pope, M. L. Purschke, I. Ravinovich, K. F. Read, K. Reygers, V. Riabov, Y. Riabov, M. Rosati, A. A. Rose, S. S. Ryu, N. Saito, A. Sakaguchi, T. Sakaguchi, H. Sako, T. Sakuma, V. Samsonov, T. C. Sangster, R. Santo, H. D. Sato, S. Sato, S. Sawada, B. R. Schlei, Y. Schutz, V. Semenov, R. Seto, T. K. Shea, I. Shein, T. A. Shibata, K. Shigaki, T. Shiina, Y. H. Shin, I. G. Sibiriak, D. Silvermyr, K. S. Sim, J. Simon-Gillo, C. P. Singh, V. Singh, M. Sivertz, A. Soldatov, R. A. Soltz, S. Sorensen, P. W. Stankus, N. Starinsky, P. Steinberg, E. Stenlund, A. Ster, S. P. Stoll, M. Sugioka, T. Sugitate, J. P. Sullivan, Y. Sumi, Z. Sun, M. Suzuki, E. M. Takagui, A. Taketani, M. Tamai, K. H. Tanaka, Y. Tanaka, E. Taniguchi, M. J. Tannenbaum, J. Thomas, J. H. Thomas, T. L. Thomas, W. Tian, J. Tojo, H. Torii, R. S. Towell, I. Tserruya, H. Tsuruoka, A. A. Tsvetkov, S. K. Tuli, H. Tydesjö, N. Tyurin, T. Ushiroda, H. W. van Hecke, C. Velissaris, J. Velkovska, M. Velkovsky, A. A. Vinogradov, M. A. Volkov, A. Vorobyov, E. Vznuzdaev, H. Wang, Y. Watanabe, S. N. White, C. Witzig, F. K. Wohn, C. L. Woody, W. Xie, K. Yagi, S. Yokkaichi, G. R. Young, I. E. Yushmanov, W. A. Zajc, Z. Zhang, S. Zhou, PHENIX Collaboration

      Physical Review Letters87 ( 5 ) 52301 - 52301-6   30 7 2001

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      Language:English   Publishing type:Research paper (scientific journal)  

      The first measurement of energy produced transverse to the beam direction at the Relativistic Heavy-Ion Collider at Brookhaven National Laboratory is presented. The midrapidity transverse energy density per participating nucleon rises steadily with the number of participants, closely paralleling the rise in charged-particle density, such that ⟨ET⟩/⟨Nch⟩ remains relatively constant as a function of centrality. The energy density calculated via Bjorken’s prescription for the 2% most central Au + Au collisions at √sNN = 130GeV is at least εBj = 4.6GeV/fm3, which is a factor of 1.6 larger than found at √sNN = 17.2GeV(Pb + Pb at CERN). © 2001 American Physical Society.

      DOI: 10.1103/PhysRevLett.87.052301

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    • Measurement of the midrapidity transverse energy distribution from √sNN = 130GeV Au + Au collisions at RHIC

      K. Adcox, S. S. Adler, N. N. Ajitanand, Y. Akiba, J. Alexander, L. Aphecetche, Y. Arai, S. H. Aronson, R. Averbeck, T. C. Awes, K. N. Barish, P. D. Barnes, J. Barrette, B. Bassalleck, S. Bathe, V. Baublis, A. Bazilevsky, S. Belikov, F. G. Bellaiche, S. T. Belyaev, M. J. Bennett, Y. Berdnikov, S. Botelho, M. L. Brooks, D. S. Brown, N. Bruner, D. Bucher, H. Buesching, V. Bumazhnov, G. Bunce, J. Burward-Hoy, S. Butsyk, T. A. Carey, P. Chand, J. Chang, W. C. Chang, L. L. Chavez, S. Chernichenko, C. Y. Chi, J. Chiba, M. Chiu, R. K. Choudhury, T. Christ, T. Chujo, M. S. Chung, P. Chung, V. Cianciolo, B. A. Cole, D. G. D’Enterria, G. David, H. Delagrange, A. Denisov, A. Deshpande, E. J. Desmond, O. Dietzsch, B. V. Dinesh, A. Drees, A. Durum, D. Dutta, K. Ebisu, Y. V. Efremenko, K. El Chenawi, H. En’yo, S. Esumi, L. Ewell, T. Ferdousi, D. E. Fields, S. L. Fokin, Z. Fraenkel, A. Franz, A. D. Frawley, S. Y. Fung, S. Garpman, T. K. Ghosh, A. Glenn, A. L. Godoi, Y. Goto, S. V. Greene, M. Grosse Perdekamp, S. K. Gupta, W. Guryn, H. Gustafsson, J. S. Haggerty, H. Hamagaki, A. G. Hansen, H. Hara, E. P. Hartouni, R. Hayano, N. Hayashi, X. He, T. K. Hemmick, J. M. Heuser, M. Hibino, J. C. Hill, D. S. Ho, K. Homma, B. Hong, A. Hoover, T. Ichihara, K. Imai, M. S. Ippolitov, M. Ishihara, B. V. Jacak, W. Y. Jang, J. Jia, B. M. Johnson, S. C. Johnson, K. S. Joo, S. Kametani, J. H. Kang, M. Kann, S. S. Kapoor, S. Kelly, B. Khachaturov, A. Khanzadeev, J. Kikuchi, D. J. Kim, H. J. Kim, S. Y. Kim, Y. G. Kim, W. W. Kinnison, E. Kistenev, A. Kiyomichi, C. Klein-Boesing, S. Klinksiek, L. Kochenda, D. Kochetkov, V. Kochetkov, D. Koehler, T. Kohama, A. Kozlov, P. J. Kroon, K. Kurita, M. J. Kweon, Y. Kwon, G. S. Kyle, R. Lacey, J. G. Lajoie, J. Lauret, A. Lebedev, D. M. Lee, M. J. Leitch, X. H. Li, Z. Li, D. J. Lim, M. X. Liu, X. Liu, Z. Liu, C. F. Maguire, J. Mahon, Y. I. Makdisi, V. I. Manko, Y. Mao, S. K. Mark, S. Markacs, G. Martinez, M. D. Marx, A. Masaike, F. Matathias, T. Matsumoto, P. L. McGaughey, E. Melnikov, M. Merschmeyer, F. Messer, M. Messer, Y. Miake, T. E. Miller, A. Milov, S. Mioduszewski, R. E. Mischke, G. C. Mishra, J. T. Mitchell, A. K. Mohanty, D. P. Morrison, J. M. Moss, F. Mühlbacher, M. Muniruzzaman, J. Murata, S. Nagamiya, Y. Nagasaka, J. L. Nagle, Y. Nakada, B. K. Nandi, J. Newby, L. Nikkinen, P. Nilsson, S. Nishimura, A. S. Nyanin, J. Nystrand, E. O’Brien, C. A. Ogilvie, H. Ohnishi, I. D. Ojha, M. Ono, V. Onuchin, A. Oskarsson, L. österman, I. Otterlund, K. Oyama, L. Paffrath, A. P.T. Palounek, V. S. Pantuev, V. Papavassiliou, S. F. Pate, T. Peitzmann, A. N. Petridis, C. Pinkenburg, R. P. Pisani, P. Pitukhin, F. Plasil, M. Pollack, K. Pope, M. L. Purschke, I. Ravinovich, K. F. Read, K. Reygers, V. Riabov, Y. Riabov, M. Rosati, A. A. Rose, S. S. Ryu, N. Saito, A. Sakaguchi, T. Sakaguchi, H. Sako, T. Sakuma, V. Samsonov, T. C. Sangster, R. Santo, H. D. Sato, S. Sato, S. Sawada, B. R. Schlei, Y. Schutz, V. Semenov, R. Seto, T. K. Shea, I. Shein, T. A. Shibata, K. Shigaki, T. Shiina, Y. H. Shin, I. G. Sibiriak, D. Silvermyr, K. S. Sim, J. Simon-Gillo, C. P. Singh, V. Singh, M. Sivertz, A. Soldatov, R. A. Soltz, S. Sorensen, P. W. Stankus, N. Starinsky, P. Steinberg, E. Stenlund, A. Ster, S. P. Stoll, M. Sugioka, T. Sugitate, J. P. Sullivan, Y. Sumi, Z. Sun, M. Suzuki, E. M. Takagui, A. Taketani, M. Tamai, K. H. Tanaka, Y. Tanaka, E. Taniguchi, M. J. Tannenbaum, J. Thomas, J. H. Thomas, T. L. Thomas, W. Tian, J. Tojo, H. Torii, R. S. Towell, I. Tserruya, H. Tsuruoka, A. A. Tsvetkov, S. K. Tuli, H. Tydesjö, N. Tyurin, T. Ushiroda, H. W. van Hecke, C. Velissaris, J. Velkovska, M. Velkovsky, A. A. Vinogradov, M. A. Volkov, A. Vorobyov, E. Vznuzdaev, H. Wang, Y. Watanabe, S. N. White, C. Witzig, F. K. Wohn, C. L. Woody, W. Xie, K. Yagi, S. Yokkaichi, G. R. Young, I. E. Yushmanov, W. A. Zajc, Z. Zhang, S. Zhou, PHENIX Collaboration

      Physical Review Letters87 ( 5 ) 52301 - 52301-6   30 7 2001

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      Language:English   Publishing type:Research paper (scientific journal)  

      The first measurement of energy produced transverse to the beam direction at the Relativistic Heavy-Ion Collider at Brookhaven National Laboratory is presented. The midrapidity transverse energy density per participating nucleon rises steadily with the number of participants, closely paralleling the rise in charged-particle density, such that ⟨ET⟩/⟨Nch⟩ remains relatively constant as a function of centrality. The energy density calculated via Bjorken’s prescription for the 2% most central Au + Au collisions at √sNN = 130GeV is at least εBj = 4.6GeV/fm3, which is a factor of 1.6 larger than found at √sNN = 17.2GeV(Pb + Pb at CERN). © 2001 American Physical Society.

      DOI: 10.1103/PhysRevLett.87.052301

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    • Localized charged-neutral fluctuations in 158A GeVPb plus Pb collisions

      MM Aggarwal, A Agnihotri, Z Ahammed, ALS Angelis, Antonenko, V, Arefiev, V, Astakhov, V, Avdeitchikov, V, TC Awes, PVKS Baba, SK Badyal, C Barlag, S Bathe, B Batiounia, T Bernier, KB Bhalla, VS Bhatia, C Blume, R Bock, EM Bohne, Z Borocz, D Bucher, A Buijs, H Busching, L Carlen, Chalyshev, V, S Chattopadhyay, R Cherbatchev, T Chujo, A Claussen, AC Das, MP Decowski, H Delagrange, Djordjadze, V, P Donni, Doubovik, I, AK Dubey, S Dutt, MRD Majumdar, K El Chenawi, S Eliseev, K Enosawa, P Foka, S Fokin, MS Ganti, S Garpman, O Gavrishchuk, FJM Geurts, TK Ghosh, R Glasow, SK Gupta, B Guskov, HA Gustafsson, HH Gutbrod, R Higuchi, Hrivnacova, I, M Ippolitov, H Kalechofsky, R Kamermans, KH Kampert, K Karadjev, K Karpio, S Kato, S Kees, C Klein-Bosing, S Knoche, BW Kolb, Kosarev, I, Koutcheryaev, I, T Krumpel, A Kugler, P Kulinich, M Kurata, K Kurita, N Kuzmin, Langbein, I, A Lebedev, YY Lee, H Lohner, L Luquin, DP Mahapatra, Manko, V, M Martin, G Martinez, A Maximov, G Mgebrichvili, Y Miake, MF Mir, GC Mishra, Y Miyamoto, B Mohanty, MJ Mora, D Morrison, DS Mukhopadhyay, H Naef, BK Nandi, SK Nayak, TK Nayak, S Neumaier, A Nianine, Nikitine, V, S Nikolaev, P Nilsson, S Nishimura, P Nomokonov, J Nystrand, FE Obenshain, A Oskarsson, Otterlund, I, M Pachr, S Pavliouk, T Peitzmann, Petracek, V, W Pinganaud, F Plasil, U von Poblotzki, ML Purschke, J Rak, R Raniwala, S Raniwala, VS Ramamurthy, NK Rao, F Retiere, K Reygers, G Roland, L Rosselet, Roufanov, I, C Roy, JM Rubio, H Sako, SS Sambyal, R Santo, S Sato, H Schlagheck, HR Schmidt, Y Schutz, G Shabratova, TH Shah, Sibiriak, I, T Siemiarczuk, D Silvermyr, BC Sinha, N Slavine, K Soderstrom, N Solomey, G Sood, SP Sorensen, P Stankus, G Stefanek, P Steinberg, E Stenlund, D Stuken, M Sumbera, T Svensson, MD Trivedi, A Tsvetkov, L Tykarski, J Urbahn, EC von der Pijll, N von Eijndhoven, GJ von Nieuwenhuizen, A Vinogradov, YP Viyogi, AV Vodopianov, S Voros, B Wyslouch, K Yagi, Y Yokota, GR Young

      PHYSICAL REVIEW C64 ( 1 ) 11901   7 2001

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER PHYSICAL SOC  

      Localized fluctuations in the multiplicity of charged particles and photons produced in central 158A GeV/c Pb+Pb collisions are studied. The charged versus neutral correlations in common eta-phi phase space regions of varying azimuthal size are analyzed by two different methods. The analysis provides a model-independent demonstration of nonstatistical fluctuations in both charged particle and photon multiplicities in limited azimuthal regions. However, no correlated charge-neutral fluctuations are observed, contrary to expectations for the production of a disoriented chiral condensate. The result is not explained by the widely used VENUS model.

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    • Centrality dependence of charged particle multiplicity in Au-Au collisions at root(S)NN=130 GeV

      K Adcox, SS Adler, NN Ajitanand, Y Akiba, J Alexander, L Aphecetche, Y Arai, SH Aronson, R Averbeck, TC Awes, KN Barish, PD Barnes, J Barrette, B Bassalleck, S Bathe, Baublis, V, A Bazilevsky, S Belikov, FG Bellaiche, ST Belyaev, MJ Bennett, Y Berdnikov, S Botelho, ML Brooks, DS Brown, N Bruner, D Bucher, H Buesching, Bumazhnov, V, G Bunce, J Burward-Hoy, S Butsyk, TA Carey, P Chand, J Chang, WC Chang, LL Chavez, S Chernichenko, CY Chi, J Chiba, M Chiu, RK Choudhury, T Christ, T Chujo, MS Chung, P Chung, Cianciolo, V, BA Cole, DG D'Enterria, G David, H Delagrange, A Denisov, A Deshpande, EJ Desmond, O Dietzsch, BV Dinesh, A Drees, A Durum, D Dutta, K Ebisu, YV Efremenko, K El Chenawi, H En'yo, S Esumi, L Ewell, T Ferdousi, DE Fields, SL Fokin, Z Fraenkel, A Franz, AD Frawley, SY Fung, S Garpman, TK Ghosh, A Glenn, AL Godoi, Y Goto, SV Greene, MG Perdekamp, SK Gupta, W Guryn, HA Gustafsson, JS Haggerty, H Hamagaki, AG Hansen, H Hara, EP Hartouni, R Hayano, N Hayashi, He, X, TK Hemmick, J Heuser, M Hibino, JC Hill, DS Ho, K Homma, B Hong, A Hoover, T Ichihara, K Imai, MS Ippolitov, M Ishihara, BV Jacak, WY Jang, J Jia, BM Johnson, SC Johnson, KS Joo, S Kametani, JH Kang, M Kam, SS Kapoor, S Kelly, B Khachaturov, A Khanzadeev, J Kikuchi, DJ Kim, HJ Kim, SY Kim, YG Kim, WW Kinnison, E Kistenev, A Kiyomichi, C Klein-Boesing, S Klinksiek, L Kochenda, D Kochetkov, Kochetkov, V, D Koehler, T Kohama, A Kozlov, PJ Kroon, K Kurita, MJ Kweon, Y Kwon, GS Kyle, R Lacey, JG Lajoie, J Lauret, A Lebedev, DM Lee, MJ Leitch, XH Li, Z Li, DJ Lim, MX Liu, Liu, X, Z Liu, CF Maguire, J Mahon, YI Makdisi, Manko, VI, Y Mao, SK Mark, S Markacs, G Martinez, MD Marx, A Masaike, F Matathias, T Matsumoto, PL McGaughey, E Melnikov, M Merschmeyer, F Messer, M Messer, Y Miake, TE Miller, A Milov, S Mioduszewski, RE Mischke, GC Mishra, JT Mitchell, AK Mohanty, DP Morrison, JM Moss, F Muhlbacher, M Muniruzzaman, J Murata, S Nagamiya, Y Nagasaka, JL Nagle, Y Nakada, BK Nandi, J Newby, L Nikkinen, P Nilsson, S Nishimura, AS Nyanin, J Nystrand, E O'Brien, CA Ogilvie, H Ohnishi, ID Ojha, M Ono, Onuchin, V, A Oskarsson, L Osterman, Otterlund, I, K Oyama, L Paffrath, APT Palounek, VS Pantuev, Papavassiliou, V, SF Pate, T Peitzmann, AN Petridis, C Pinkenburg, RP Pisani, P Pitukhin, F Plasil, M Pollack, K Pope, ML Purschke, Ravinovich, I, KF Read, K Reygers, Riabov, V, Y Riabov, M Rosati, AA Rose, SS Ryu, N Saito, A Sakaguchi, T Sakaguchi, H Sako, T Sakuma, Samsonov, V, TC Sangster, R Santo, HD Sato, S Sato, S Sawada, BR Schlei, Y Schutz, Semenov, V, R Seto, TK Shea, Shein, I, TA Shibata, K Shigaki, T Shiina, YH Shin, IG Sibiriak, D Silvermyr, KS Sim, J Simon-Gillo, CP Singh, Singh, V, M Sivertz, A Soldatov, RA Soltz, S Sorensen, PW Stankus, N Starinsky, P Steinberg, E Stenlund, A Ster, SP Stoll, M Sugioka, T Sugitate, JP Sullivan, Y Sumi, Z Sun, M Suzuki, EM Takagui, A Taketani, M Tamai, KH Tanaka, Y Tanaka, E Taniguchi, MJ Tannenbaum, J Thomas, JH Thomas, TL Thomas, W Tian, J Tojo, H Torii, RS Towell, Tserruya, I, H Tsuruoka, AA Tsvetkov, SK Tuli, H Tydesjo, N Tyurin, T Ushiroda, HW van Hecke, C Velissaris, J Velkovska, M Velkovsky, AA Vinogradov, MA Volkov, A Vorobyov, E Vznuzdnev, H Wang, Y Watanabe, SN White, C Witzig, FK Wohn, CL Woody, W Xie, K Yagi, S Yokkaichi, GR Young, IE Yushmanov, WA Zajc, Z Zhang, S Zhou

      PHYSICAL REVIEW LETTERS86 ( 16 ) 3500 - 3505   4 2001

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMERICAN PHYSICAL SOC  

      We present results for the charged-particle multiplicity distribution at midrapidity in Au-Au collisions at roots(NN) = 130 GeV measured with the PHENIX detector at RHIC. For the 5% most central collisions we find dN(ch)/d eta (|eta =0) = 622 +/- 1(stat) +/- 41(syst). The results, analyzed as a function of centrality show a steady rise of the particle density per participating nucleon with centrality.

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    • Measurement of the analyzing power for proton-carbon elastic scattering in the CNT region with a 22 GeV/c polarized proton beam

      J Tojo, Alekseev, I, M Bai, B Bassalleck, G Bunce, A Deshpande, J Doskow, S Eilerts, DE Fields, Y Goto, H Huang, Hughes, V, K Imai, M Ishihara, Kanavets, V, K Kurita, K Kwiatkowski, B Lewis, B Lozowski, Y Makdisi, HO Meyer, BV Morozov, M Nakamura, B Przewoski, T Rinkel, T Roser, A Rusek, N Saito, B Smith, D Svirida, M Syphers, A Taketani, TL Thomas, D Underwood, D Wolfe, K Yamamoto, L Zhu

      SPIN 2000570   790 - 794   2001

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      Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:AMER INST PHYSICS  

      We have carried out the experiment BNL-AGS E950 to measure the analyzing power for proton-carbon elastic scattering in the Coulomb-Nuclear Interference (CNI) region with a 22 GeV/c polarized proton beam. Recoil carbons from 300 keV to a few MeV in the CNI region, were detected inside the AGS ring to identify proton-carbon elastic scattering, The preliminary results of the analyzing power measurement are presented.

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    • Commissioning of RHIC p-carbon CNI polarimeter

      H Huang, Alekseev, I, G Bunce, A Deshpande, D Fields, K Imai, Kanavets, V, K Kurita, B Lozowski, W MacKay, Y Makdisi, T Roser, N Saito, H Spinka, D Svirida, J Tojo, D Underwood

      SPIN 2000570   795 - 799   2001

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      Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:AMER INST PHYSICS  

      An innovative polarimeter based on proton carbon elastic scattering in the Coulomb Nuclear Interference (CNI) region has been installed and commissioned in the Blue ring of RHIC during the first RHIC polarized proton commissioning. The polarimeter consists of ultra-thin carbon targets and four silicon detectors. All elements are in a 1.6 meter target chamber. It worked very well as a pivotal tool during the commissioning. It demonstrated that the RHIC snake magnets rotate spin to the expected direction, The results also show that polarized proton beam has been accelerated in RHIC and the polarization is maintained up to 29 GeV.

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    • Proton Carbon CNI Polarimeter for RHIC

      栗田 和好

      Proceedings of International Workshop on the Spin Structure of the Proton and Polarized Collider Physics   1 1 2001

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      Language:English   Publishing type:Research paper (other academic)  

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    • Scaling of particle and transverse energy production in Pb-208+Pb-208 collisions at 158 center dot A GeV

      MM Aggarwal, A Agnihotri, Z Ahammed, ALS Angelis, Antonenko, V, Arefiev, V, Astakhov, V, Avdeitchikov, V, TC Awes, PVKS Baba, SK Badyal, A Baldine, L Barabach, C Barlag, S Bathe, B Batiounia, T Bernier, KB Bhalla, VS Bhatia, C Blume, EM Bohne, ZK Borocz, D Bucher, A Buijs, H Busching, L Carlen, Chalyshev, V, S Chattopadhyay, R Cherbatchev, T Chujo, A Claussen, AC Das, MP Decowski, H Delagrange, Djordjadze, V, P Donni, Doubovik, I, S Dutt, MRD Majumdar, K El Chenawi, S Eliseev, K Enosawa, P Foka, S Fokin, Frolov, V, MS Ganti, S Garpman, O Gavrishchuk, FJM Geurts, TK Ghosh, R Glasow, SK Gupta, B Guskov, HA Gustafsson, HH Gutbrod, R Higuchi, Hrivnacova, I, M Ippolitov, H Kalechofsky, R Kamermans, KH Kampert, K Karadjev, K Karpio, S Kato, S Kees, H Kim, BW Kolb, Kosarev, I, Koutcheryaev, I, T Krumpel, A Kugler, P Kulinich, M Kurata, K Kurita, N Kuzmin, Langbein, I, A Lebedev, YY Lee, H Lohner, L Luquin, DP Mahapatra, Manko, V, M Martin, G Martinez, A Maximov, R Mehdiyev, G Mgebrichvili, Y Miake, D Mikhalev, MF Mir, GC Mishra, Y Miyamoto, B Mohanty, MJ Mora, D Morrison, DS Mukhopadhyay, Myalkovski, V, H Naef, BK Nandi, SK Nayak, TK Nayak, S Neumaier, A Nianine, Nikitine, V, S Nikolaev, P Nilsson, S Nishimura, P Nomokonov, J Nystrand, FE Obenshain, A Oskarsson, Otterlund, I, M Pachr, A Parfenov, S Pavliouk, T Peitzmann, Petracek, V, F Plasil, W Pinganaud, ML Purschke, B Raeven, J Rak, R Raniwala, S Raniwala, VS Ramamurthy, NK Rao, F Retiere, K Reygers, G Roland, L Rosselet, Roufanov, I, C Roy, JM Rubio, H Sako, SS Sambyal, R Santo, S Sato, H Schlagheck, HR Schmidt, Y Schutz, G Shabratova, TH Shah, Sibiriak, I, T Siemiarczuk, D Silvermyr, BC Sinha, N Slavine, K Soderstrom, N Solomey, SP Sorensen, P Stankus, G Stefanek, P Steinberg, E Stenlund, D Stuken, M Sumbera, T Svensson, MD Trivedi, A Tsvetkov, L Tykarski, J Urbahn, EC van der Pijll, N van Eijndhoven, GJ van Nieuwenhuizen, A Vinogradov, YP Viyogi, A Vodopianov, S Voros, B Wyslouch, K Yagi, Y Yokota, GR Young

      EUROPEAN PHYSICAL JOURNAL C18 ( 4 ) 651 - 663   1 2001

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:SPRINGER  

      Transverse energy, charged particle pseudorapidity distributions and photon transverse momentum spectra have been studied as a function of the number of participants (N-part) and the number of binary nucleon-nucleon collisions (N-coll) in 158.A GeV Pb+Pb collisions over a wide impact parameter range. A scaling of the transverse energy pseudorapidity density at midrapidity as similar to N-part(1.08+/-0.06) and similar toN(coll)(0.83+/-0.05) is part coil observed. For the charged particle pseudorapidity density at midrapidity we find a scaling as similar to N-part(1.07+/-0.04) and similar toN(coll)(0.82+/-0.03). This faster than linear scaling with N-part indicates a violation of the naive Wounded Nucleon Model.

      DOI: 10.1007/s100520100578

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    • Commissioning of RHIC p-carbon CNI polarimeter

      H Huang, Alekseev, I, G Bunce, A Deshpande, D Fields, K Imai, Kanavets, V, K Kurita, B Lozowski, W MacKay, Y Makdisi, T Roser, N Saito, H Spinka, D Svirida, J Tojo, D Underwood

      SPIN 2000570   795 - 799   2001

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      Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:AMER INST PHYSICS  

      An innovative polarimeter based on proton carbon elastic scattering in the Coulomb Nuclear Interference (CNI) region has been installed and commissioned in the Blue ring of RHIC during the first RHIC polarized proton commissioning. The polarimeter consists of ultra-thin carbon targets and four silicon detectors. All elements are in a 1.6 meter target chamber. It worked very well as a pivotal tool during the commissioning. It demonstrated that the RHIC snake magnets rotate spin to the expected direction, The results also show that polarized proton beam has been accelerated in RHIC and the polarization is maintained up to 29 GeV.

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    • Three-pion interferometry results from central Pb plus Pb collisions at 158A GeV/c

      MM Aggarwal, A Agnihotri, Z Ahammed, ALS Angelis, Antonenko, V, Arefiev, V, Astakhov, V, Avdeitchikov, V, TC Awes, PVKS Baba, SK Badyal, C Barlag, S Bathe, B Batiounia, T Bernier, KB Bhalla, VS Bhatia, C Blume, R Bock, EM Bohne, Z Borocz, D Bucher, A Buijs, H Busching, L Carlen, Chalyshev, V, S Chattopadhyay, R Cherbatchev, T Chujo, A Claussen, AC Das, MP Decowski, H Delagrange, Djordjadze, V, P Donni, Doubovik, I, S Dutt, MRD Majumdar, K El Chenawi, S Eliseev, K Enosawa, P Foka, S Fokin, MS Ganti, S Garpman, O Gavrishchuk, FJM Geurts, TK Ghosh, R Glasow, SK Gupta, B Guskov, HA Gustafsson, HH Gutbrod, R Higuchi, Hrivnacova, I, M Ippolitov, H Kalechofsky, R Kamermans, KH Kampert, K Karadjev, K Karpio, S Kato, S Kees, C Klein-Bosing, S Knoche, BW Kolb, Kosarev, I, Koutcheryaev, I, T Krumpel, A Kugler, P Kulinich, M Kurata, K Kurita, N Kuzmin, Langbein, I, A Lebedev, YY Lee, H Lohner, L Luquin, DP Mahapatra, Manko, V, M Martin, G Martinez, A Maximov, G Mgebrichvili, Y Miake, MF Mir, GC Mishra, Y Miyamoto, B Mohanty, MJ Mora, D Morrison, DS Mukhopadhyay, H Naef, BK Nandi, SK Nayak, TK Nayak, S Neumaier, A Nianine, Nikitine, V, S Nikolaev, P Nilsson, S Nishimura, P Nomokonov, J Nystrand, FE Obenshain, A Oskarsson, Otterlund, I, M Pachr, S Pavliouk, T Peitzmann, Petracek, V, W Pinganaud, F Plasil, U von Poblotzki, ML Purschke, J Rak, R Raniwala, S Raniwala, VS Ramamurthy, NK Rao, F Retiere, K Reygers, G Roland, L Rosselet, Roufanov, I, C Roy, JM Rubio, H Sako, SS Sambyal, R Santo, S Sato, H Schlagheck, HR Schmidt, Y Schutz, G Shabratova, TH Shah, Sibiriak, I, T Siemiarczuk, D Silvermyr, BC Sinha, N Slavine, K Soderstrom, N Solomey, SP Sorensen, P Stankus, G Stefanek, P Steinberg, E Stenlund, D Stuken, M Sumbera, T Svensson, MD Trivedi, A Tsvetkov, L Tykarski, J Urbahn, EC van der Pijll, N van Eijndhoven, GJ van Nieuwenhuizen, A Vinogradov, YP Viyogi, A Vodopianov, S Voros, B Wyslouch, K Yagi, Y Yokota, GR Young

      PHYSICAL REVIEW LETTERS85 ( 14 ) 2895 - 2899   10 2000

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMERICAN PHYSICAL SOC  

      Three-particle correlations have been measured for identified pi(-) from central 158A GeV Pb + Pb collisions by the WA98 experiment at CERN. A substantial contribution of the genuine three-body correlation has been found as expected for a mainly chaotic and symmetric source.

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    • Observation of direct photons in central 158A GeV Pb-208+Pb-208 collisions

      MM Aggarwal, A Agnihotri, Z Ahammed, ALS Angelis, Antonenko, V, Arefiev, V, Astakhov, V, Avdeitchikov, V, TC Awes, PVKS Baba, SK Badyal, C Barlag, S Bathe, B Batiounia, T Bernier, KB Bhalla, VS Bhatia, C Blume, R Bock, EM Bohne, Z Borocz, D Bucher, A Buijs, H Busching, L Carlen, Chalyshev, V, S Chattopadhyay, R Cherbatchev, T Chujo, A Claussen, AC Das, MP Decowski, H Delagrange, Djordjadze, V, P Donni, Doubovik, I, S Dutt, MRD Majumdar, K El Chenawi, S Eliseev, K Enosawa, P Foka, S Fokin, MS Ganti, S Garpman, O Gavrishchuk, FJM Geurts, TK Ghosh, R Glasow, SK Gupta, B Guskov, HA Gustafsson, HH Gutbrod, R Higuchi, Hrivnacova, I, M Ippolitov, H Kalechofsky, R Kamermans, KH Kampert, K Karadjev, K Karpio, S Kato, S Kees, C Klein-Bosing, S Knoche, BW Kolb, Kosarev, I, Koutcheryaev, I, T Krumpel, A Kugler, P Kulinich, M Kurata, K Kurita, N Kuzmin, Langbein, I, A Lebedev, YY Lee, H Lohner, L Luquin, DP Mahapatra, Manko, V, M Martin, G Martinez, A Maximov, G Mgebrichvili, Y Miake, MF Mir, GC Mishra, Y Miyamoto, B Mohanty, MJ Mora, D Morrison, DS Mukhopadhyay, H Naef, BK Nandi, SK Nayak, TK Nayak, S Neumaier, A Nianine, Nikitine, V, S Nikolaev, P Nilsson, S Nishimura, P Nomokonov, J Nystrand, FE Obenshain, A Oskarsson, Otterlund, I, M Pachr, S Pavliouk, T Peitzmann, Petracek, V, W Pinganaud, F Plasil, U von Poblotzki, ML Purschke, J Rak, R Raniwala, S Raniwala, VS Ramamurthy, NK Rao, F Retiere, K Reygers, G Roland, L Rosselet, Roufanov, I, C Roy, JM Rubio, H Sako, SS Sambyal, R Santo, S Sato, H Schlagheck, HR Schmidt, Y Schutz, G Shabratova, TH Shah, Sibiriak, I, T Siemiarczuk, D Silvermyr, BC Sinha, N Slavine, K Soderstrom, N Solomey, G Good, SP Sorensen, P Stankus, G Stefanek, P Steinberg, E Stenlund, D Stuken, M Sumbera, T Svensson, MD Trivedi, A Tsvetkov, L Tykarski, J Urbahn, EC von der Pijll, N von Eijndhoven, GJ von Nieuwenhuizen, A Vinogradov, YP Viyogi, A Vodopianov, S Voros, B Wyslouch, K Yagi, Y Yokota, GR Young

      PHYSICAL REVIEW LETTERS85 ( 17 ) 3595 - 3599   10 2000

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMERICAN PHYSICAL SOC  

      A measurement of direct photon production in Pb-208 + Pb-208 collisions at 158A GeV has been carried out in the CERN WA98 experiment. The invariant yield of direct photons in central collisions is extracted as a function of transverse momentum in the interval 0.5 &lt; p(T) &lt; 4 GeV/c. A significant direct photon signal, compared to statistical and systematical errors, is seen at p(T) &gt; 1.5 GeV/c. The result constitutes the first observation of direct photons in ultrarelativistic heavy-ion collisions. It could be significant for diagnosis;of quark-gluon-plasma formation.

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    • Observation of direct photons in central 158A GeV Pb-208+Pb-208 collisions

      MM Aggarwal, A Agnihotri, Z Ahammed, ALS Angelis, Antonenko, V, Arefiev, V, Astakhov, V, Avdeitchikov, V, TC Awes, PVKS Baba, SK Badyal, C Barlag, S Bathe, B Batiounia, T Bernier, KB Bhalla, VS Bhatia, C Blume, R Bock, EM Bohne, Z Borocz, D Bucher, A Buijs, H Busching, L Carlen, Chalyshev, V, S Chattopadhyay, R Cherbatchev, T Chujo, A Claussen, AC Das, MP Decowski, H Delagrange, Djordjadze, V, P Donni, Doubovik, I, S Dutt, MRD Majumdar, K El Chenawi, S Eliseev, K Enosawa, P Foka, S Fokin, MS Ganti, S Garpman, O Gavrishchuk, FJM Geurts, TK Ghosh, R Glasow, SK Gupta, B Guskov, HA Gustafsson, HH Gutbrod, R Higuchi, Hrivnacova, I, M Ippolitov, H Kalechofsky, R Kamermans, KH Kampert, K Karadjev, K Karpio, S Kato, S Kees, C Klein-Bosing, S Knoche, BW Kolb, Kosarev, I, Koutcheryaev, I, T Krumpel, A Kugler, P Kulinich, M Kurata, K Kurita, N Kuzmin, Langbein, I, A Lebedev, YY Lee, H Lohner, L Luquin, DP Mahapatra, Manko, V, M Martin, G Martinez, A Maximov, G Mgebrichvili, Y Miake, MF Mir, GC Mishra, Y Miyamoto, B Mohanty, MJ Mora, D Morrison, DS Mukhopadhyay, H Naef, BK Nandi, SK Nayak, TK Nayak, S Neumaier, A Nianine, Nikitine, V, S Nikolaev, P Nilsson, S Nishimura, P Nomokonov, J Nystrand, FE Obenshain, A Oskarsson, Otterlund, I, M Pachr, S Pavliouk, T Peitzmann, Petracek, V, W Pinganaud, F Plasil, U von Poblotzki, ML Purschke, J Rak, R Raniwala, S Raniwala, VS Ramamurthy, NK Rao, F Retiere, K Reygers, G Roland, L Rosselet, Roufanov, I, C Roy, JM Rubio, H Sako, SS Sambyal, R Santo, S Sato, H Schlagheck, HR Schmidt, Y Schutz, G Shabratova, TH Shah, Sibiriak, I, T Siemiarczuk, D Silvermyr, BC Sinha, N Slavine, K Soderstrom, N Solomey, G Good, SP Sorensen, P Stankus, G Stefanek, P Steinberg, E Stenlund, D Stuken, M Sumbera, T Svensson, MD Trivedi, A Tsvetkov, L Tykarski, J Urbahn, EC von der Pijll, N von Eijndhoven, GJ von Nieuwenhuizen, A Vinogradov, YP Viyogi, A Vodopianov, S Voros, B Wyslouch, K Yagi, Y Yokota, GR Young

      PHYSICAL REVIEW LETTERS85 ( 17 ) 3595 - 3599   10 2000

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMERICAN PHYSICAL SOC  

      A measurement of direct photon production in Pb-208 + Pb-208 collisions at 158A GeV has been carried out in the CERN WA98 experiment. The invariant yield of direct photons in central collisions is extracted as a function of transverse momentum in the interval 0.5 &lt; p(T) &lt; 4 GeV/c. A significant direct photon signal, compared to statistical and systematical errors, is seen at p(T) &gt; 1.5 GeV/c. The result constitutes the first observation of direct photons in ultrarelativistic heavy-ion collisions. It could be significant for diagnosis;of quark-gluon-plasma formation.

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    • Central Pb plus Pb collisions at 158 A GeV/c studied by pi(-)pi(-) interferometry

      MM Aggarwal, A Agnihotri, Z Ahammed, ALS Angelis, Antonenko, V, Arefiev, V, Astakhov, V, Avdeitchikov, V, TC Awes, PVKS Baba, SK Badyal, C Barlag, S Bathe, B Batiounia, T Bernier, KB Bhalla, VS Bhatia, C Blume, R Bock, EM Bohne, Z Borocz, D Bucher, A Buijs, H Busching, L Carlen, Chalyshev, V, S Chattopadhyay, R Cherbatchev, T Chujo, A Claussen, AC Das, MP Decowski, H Delagrange, Djordjadze, V, P Donni, Doubovik, I, S Dutt, MRD Majumdar, K El Chenawi, S Eliseev, K Enosawa, P Foka, S Fokin, MS Ganti, S Garpman, O Gavrishchuk, FJM Geurts, TK Ghosh, R Glasow, SK Gupta, B Guskov, HA Gustafsson, HH Gutbrod, R Higuchi, Hrivnacova, I, M Ippolitov, H Kalechofsky, R Kamermans, KH Kampert, K Karadjev, K Karpio, S Kato, S Kees, C Klein-Bosing, S Knoche, BW Kolb, Kosarev, I, Koutcheryaev, I, T Krumpel, A Kugler, P Kulinich, M Kurata, K Kurita, N Kuzmin, Langbein, I, A Lebedev, YY Lee, H Lohner, L Luquin, DP Mahapatra, Manko, V, M Martin, G Martinez, A Maximov, G Mgebrichvili, Y Miake, MF Mir, GC Mishra, Y Miyamoto, B Mohanty, D Morrison, DS Mukhopadhyay, H Naef, BK Nandi, SK Nayak, TK Nayak, S Neumaier, A Nianine, Nikitine, V, S Nikolaev, P Nilsson, S Nishimura, P Nomokonov, J Nystrand, FE Obenshain, A Oskarsson, Otterlund, I, M Pachr, S Pavliouk, T Peitzmann, Petracek, V, W Pinganaud, F Plasil, U von Poblotzki, ML Purschke, J Rak, R Raniwala, S Raniwala, VS Ramamurthy, NK Rao, F Retiere, K Reygers, G Roland, L Rosselet, Roufanov, I, C Roy, JM Rubio, H Sako, SS Sambyal, R Santo, S Sato, H Schlagheck, HR Schmidt, Y Schutz, G Shabratova, TH Shah, Sibiriak, I, T Siemiarczuk, D Silvermyr, BC Sinha, N Slavine, K Soderstrom, N Solomey, SP Sorensen, P Stankus, G Stefanek, P Steinberg, E Stenlund, D Stuken, M Sumbera, T Svensson, MD Trivedi, A Tsvetkov, L Tykarski, J Urbahn, EC vander Pijll, N von Eijndhoven, GJ von Nieuwenhuizen, A Vinogradov, YP Viyogi, A Vodopianov, S Voros, B Wyslouch, K Yagi, Y Yokota, GR Young

      EUROPEAN PHYSICAL JOURNAL C16 ( 3 ) 445 - 451   9 2000

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:SPRINGER  

      Two-particle correlations have been measured for identified pi(-) from central 158 A GeV Pb+Pb collisions and fitted radii of about 7 fm in all dimensions have been obtained. A multi-dimensional study of the radii as a function of k(gamma) is presented, including a full correction for the resolution effects of the apparatus. The cross term R-out-long(2) of the standard fit in the Longitudinally CoMoving System (LCMS) and the upsilon(L) parameter of the generalised Yano-Koonin fit are compatible with 0, suggesting that the source undergoes a boost invariant expansion.
      The shapes of the correlation functions in Q(inv) and Q(space) = root&lt;(Q(x)(2) + Q(y)(2) + Q(z)(2))over bar&gt; have been analyzed in detail. They are not Gaussian but better represented by exponentials. As a consequence, fitting Gaussians to these correlation functions may produce different radii depending on the acceptance of the experimental setup used for the measurement.

      DOI: 10.1007/s100520000413

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    • Central Pb plus Pb collisions at 158 A GeV/c studied by pi(-)pi(-) interferometry

      MM Aggarwal, A Agnihotri, Z Ahammed, ALS Angelis, Antonenko, V, Arefiev, V, Astakhov, V, Avdeitchikov, V, TC Awes, PVKS Baba, SK Badyal, C Barlag, S Bathe, B Batiounia, T Bernier, KB Bhalla, VS Bhatia, C Blume, R Bock, EM Bohne, Z Borocz, D Bucher, A Buijs, H Busching, L Carlen, Chalyshev, V, S Chattopadhyay, R Cherbatchev, T Chujo, A Claussen, AC Das, MP Decowski, H Delagrange, Djordjadze, V, P Donni, Doubovik, I, S Dutt, MRD Majumdar, K El Chenawi, S Eliseev, K Enosawa, P Foka, S Fokin, MS Ganti, S Garpman, O Gavrishchuk, FJM Geurts, TK Ghosh, R Glasow, SK Gupta, B Guskov, HA Gustafsson, HH Gutbrod, R Higuchi, Hrivnacova, I, M Ippolitov, H Kalechofsky, R Kamermans, KH Kampert, K Karadjev, K Karpio, S Kato, S Kees, C Klein-Bosing, S Knoche, BW Kolb, Kosarev, I, Koutcheryaev, I, T Krumpel, A Kugler, P Kulinich, M Kurata, K Kurita, N Kuzmin, Langbein, I, A Lebedev, YY Lee, H Lohner, L Luquin, DP Mahapatra, Manko, V, M Martin, G Martinez, A Maximov, G Mgebrichvili, Y Miake, MF Mir, GC Mishra, Y Miyamoto, B Mohanty, D Morrison, DS Mukhopadhyay, H Naef, BK Nandi, SK Nayak, TK Nayak, S Neumaier, A Nianine, Nikitine, V, S Nikolaev, P Nilsson, S Nishimura, P Nomokonov, J Nystrand, FE Obenshain, A Oskarsson, Otterlund, I, M Pachr, S Pavliouk, T Peitzmann, Petracek, V, W Pinganaud, F Plasil, U von Poblotzki, ML Purschke, J Rak, R Raniwala, S Raniwala, VS Ramamurthy, NK Rao, F Retiere, K Reygers, G Roland, L Rosselet, Roufanov, I, C Roy, JM Rubio, H Sako, SS Sambyal, R Santo, S Sato, H Schlagheck, HR Schmidt, Y Schutz, G Shabratova, TH Shah, Sibiriak, I, T Siemiarczuk, D Silvermyr, BC Sinha, N Slavine, K Soderstrom, N Solomey, SP Sorensen, P Stankus, G Stefanek, P Steinberg, E Stenlund, D Stuken, M Sumbera, T Svensson, MD Trivedi, A Tsvetkov, L Tykarski, J Urbahn, EC vander Pijll, N von Eijndhoven, GJ von Nieuwenhuizen, A Vinogradov, YP Viyogi, A Vodopianov, S Voros, B Wyslouch, K Yagi, Y Yokota, GR Young

      EUROPEAN PHYSICAL JOURNAL C16 ( 3 ) 445 - 451   9 2000

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      Language:English   Publishing type:Research paper (scientific journal)   Publisher:SPRINGER  

      Two-particle correlations have been measured for identified pi(-) from central 158 A GeV Pb+Pb collisions and fitted radii of about 7 fm in all dimensions have been obtained. A multi-dimensional study of the radii as a function of k(gamma) is presented, including a full correction for the resolution effects of the apparatus. The cross term R-out-long(2) of the standard fit in the Longitudinally CoMoving System (LCMS) and the upsilon(L) parameter of the generalised Yano-Koonin fit are compatible with 0, suggesting that the source undergoes a boost invariant expansion.
      The shapes of the correlation functions in Q(inv) and Q(space) = root&lt;(Q(x)(2) + Q(y)(2) + Q(z)(2))over bar&gt; have been analyzed in detail. They are not Gaussian but better represented by exponentials. As a consequence, fitting Gaussians to these correlation functions may produce different radii depending on the acceptance of the experimental setup used for the measurement.

      DOI: 10.1007/s100520000413

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    • Delta(++) production in 158 A GeV Pb-208+Pb-208 interactions at the CERN SPS

      MM Aggarwal, A Agnihotri, Z Ahammed, ALS Angelis, Antonenko, V, Arefiev, V, Astakhov, V, Avdeitchikov, V, TC Awes, PVKS Baba, SK Badyal, A Baldine, L Barabach, C Barlag, S Bathe, B Batiounia, T Bernier, KB Bhalla, VS Bhatia, C Blume, R Bock, EM Bohne, Z Borocz, D Bucher, A Buijs, H Busching, L Carlen, Chalyshev, V, S Chattopadhyay, R Cherbatchev, T Chujo, A Claussen, AC Das, MP Decowski, H Delagrange, Djordjadze, V, P Donni, Doubovik, I, S Dutt, MRD Majumdar, K El Chenawi, S Eliseev, K Enosawa, P Foka, S Fokin, Frolov, V, MS Ganti, S Garpman, O Gavrishchuk, FJM Geurts, TK Ghosh, R Glasow, SK Gupta, B Guskov, HA Gustafsson, HH Gutbrod, R Higuchi, Hrivnacova, I, M Ippolitov, H Kalechofsky, R Kamermans, KH Kampert, K Karadjev, K Karpio, S Kato, S Kees, BW Kolb, Kosarev, I, Koutcheryaev, I, T Krumpel, A Kugler, P Kulinich, M Kurata, K Kurita, N Kuzmin, Langbein, I, A Lebedev, YY Lee, H Lohner, L Luquin, DP Mahapatra, Manko, V, M Martin, G Martinez, A Maximov, R Mehdiyev, G Mgebrichvili, Y Miake, D Mikhalev, MF Mir, GC Mishra, Y Miyamoto, B Mohanty, D Morrison, DS Mukhopadhyay, Myalkovski, V, H Naef, BK Nandi, SK Nayak, TK Nayak, S Neumaier, A Nianine, Nikitine, V, S Nikolaev, P Nilsson, S Nishimura, P Nomokonov, J Nystrand, FE Obenshain, A Oskarsson, Otterlund, I, M Pachr, A Parfenov, S Pavliouk, T Peitzmann, Petracek, V, F Plasil, W Pinganaud, ML Purschke, J Rak, R Raniwala, S Raniwala, VS Ramamurthy, NK Rao, F Retiere, K Reygers, G Roland, L Rosselet, Roufanov, I, C Roy, JM Rubio, H Sako, SS Sambyal, R Santo, S Sato, H Schlagheck, HR Schmidt, Y Schutz, G Shabratova, TH Shah, Sibiriak, I, T Siemiarczuk, D Silvermyr, BC Sinha, N Slavine, K Soderstrom, N Solomey, SP Sorensen, P Stankus, G Stefanek, P Steinberg, E Stenlund, D Stuken, M Sumbera, T Svensson, MD Trivedi, A Tsvetkov, L Tykarski, J Urbahn, EC van der Pijll, N van Eijndhoven, GJ van Nieuwenhuizen, A Vinogradov, YP Viyogi, A Vodopianov, S Voros, B Wyslouch, K Yagi, Y Yokota, GR Young

      PHYSICS LETTERS B477 ( 1-3 ) 37 - 44   3 2000

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      The Delta(++)-resonance production in central 158 A GeV Pb-208 + Pb-208 collisions at the CERN SPS has been studied. The Delta(++) production was estimated from the invariant mass spectrum of p pi(+)-pairs by subtracting a mixed event background. The measured Delta(++) abundance is compared with the results from other experiments at lower energies, and with a model calculation assuming thermal and chemical equilibrium. (C) 2000 Elsevier Science B.V. All rights reserved.

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    • Study of the Spin Structure of the Nucleon with RHIC-PHENIX

      栗田 和好

      Proceedings of Lake Louise Winter Institute 2000"From Particles to the Universe",Feb.20-26,2000   1 1 2000

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    • An Excitation Function Of K- And K+ Production In Au + Au Reactions At Rhe AGS.

      栗田 和好

      Phys.Lett.B490:   53 - 60   1 1 2000

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    • Direct Photon Production In 158-A/Gev Pb-208 + Pb-208 Collisions.

      栗田 和好

      Submitted Phys.Rev.C   1 1 2000

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    • A large-acceptance spectrometer for tracking in a high-multiplicity environment, based on space point measurements and high-resolution time-of-flight

      L Carlen, K El Chenawi, T Chujo, K Enosawa, S Garpman, HA Gustafsson, M Kurata, K Kurita, H Lohner, M Martin, Y Miake, Y Miyamoto, H Naef, P Nilsson, S Nishimura, J Nystrand, A Oskarsson, L Osterman, Otterlund, I, E Perrin, L Rosselet, JM Rubio, H Sako, S Sato, D Silvermyr, K Soderstrom, N Solomey, E Stenlund, T Svensson, S Voros, K Yagi, Y Yokota

      NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT431 ( 1-2 ) 123 - 133   7 1999

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      A large acceptance tracking system, specially developed for tracking at very high particle densities encountered in ultra-relativistic heavy-ion collisions is described. The system is a combination of multi-step avalanche chambers equipped with electronic pad readout with high position resolution in two dimensions and streamer-tube detectors with pad readout, with coarser position resolution, that is sufficient for safe pattern recognition. A high-resolution time-of-flight system (time resolution better than 90 ps) provides particle identification up to 8 GeV/c for pions and protons and pion/kaon separation up to 4 GeV/c. All detectors in the tracking system are read out with new, high-performance integrated circuits. The system can operate at high event rates due to efficient zero suppression. The performance of the system for tracking under real running conditions with Pb-beam at 158 A GeV in the WA98 experiment at CERN is presented. (C) 1999 Elsevier Science B.V. All rights reserved.

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    • Systematics of inclusive photon production in 158 center dot A GeVPb induced reactions on Ni, Nb, and Pb targets

      MM Aggarwal, A Agnihotri, Z Ahammed, ALS Angelis, Antonenko, V, Arefiev, V, Astakhov, V, Avdeitchikov, V, TC Awes, PVKS Baba, SK Badyal, A Baldine, L Barabach, C Barlag, S Bathe, B Batiounia, T Bernier, KB Bhalla, VS Bhatia, C Blume, R Bock, EM Bohne, Z Borocz, D Bucher, A Buijs, H Busching, L Carlen, Chalyshev, V, S Chattopadhyay, R Cherbatchev, T Chujo, A Claussen, AC Das, MP Decowski, Djordjadze, V, P Donni, Doubovik, I, S Dutt, MRD Majumdar, K El Chenawi, S Eliseev, K Enosawa, P Foka, S Fokin, Frolov, V, MS Ganti, S Garpman, O Gavrishchuk, FJM Geurts, TK Ghosh, R Glasow, SK Gupta, B Guskov, HA Gustafsson, HH Gutbrod, R Higuchi, Hrivnacova, I, M Ippolitov, H Kalechofsky, R Kamermans, KH Kampert, K Karadjev, K Karpio, S Kato, S Kees, H Kim, BW Kolb, Kosarev, I, Koutcheryaev, I, T Krumpel, A Kugler, P Kulinich, M Kurata, K Kurita, N Kuzmin, Langbein, I, A Lebedev, YY Lee, H Lohner, L Luquin, DP Mahapatra, Manko, V, M Martin, A Maximov, R Mehdiyev, G Mgebrichvili, Y Miake, D Mikhalev, MF Mir, GC Mishra, Y Miyamoto, D Morrison, DS Mukhopadhyay, Myalkovski, V, H Naef, BK Nandi, SK Nayak, TK Nayak, S Neumaier, A Nianine, Nikitine, V, S Nikolaev, P Nilsson, S Nishimura, P Nomokonov, J Nystrand, FE Obenshain, A Oskarsson, Otterlund, I, M Pachr, A Parfenov, S Pavliouk, T Peitzmann, Petracek, V, F Plasil, W Pinanaud, ML Purschke, B Raeven, J Rak, R Raniwala, S Raniwala, VS Ramamurthy, NK Rao, F Retiere, K Reygers, G Roland, L Rosselet, Roufanov, I, C Roy, JM Rubio, H Sako, SS Sambyal, R Santo, S Sato, H Schlagheck, HR Schmidt, G Shabratova, TH Shah, Sibiriak, I, T Siemiarczuk, D Silvermyr, BC Sinha, N Slavine, K Soderstrom, N Solomey, SP Sorensen, P Stankus, G Stefanek, P Steinberg, E Stenlund, D Stuken, M Sumbera, T Svensson, MD Trivedi, A Tsvetkov, C Twenhofel, L Tykarski, J Urbahn, N Von Eijndhoven, GJ Von Nieuwenhuizen, A Vinogradov, YP Viyogi, A Vodopianov, S Voros, B Wyslouch, K Yagi, Y Yokota, GR Young

      PHYSICS LETTERS B458 ( 2-3 ) 422 - 430   7 1999

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      The multiplicity of inclusive photons has been measured on an event-by-event basis for 158.A GeV Pb induced reactions on Ni, Nb, and Pb targets. The systematics of the pseudorapidity densities at midrapidity (rho(max)) and the width of the pseudorapidity distributions have been studied for varying centralities for these collisions. A power law fit to the photon yield as a function of the number of participating nucleons gives a value of 1.12 +/- 0.03 for the exponent. The mean transverse momentum, [p(T)], of photons determined from the ratio of the measured electromagnetic transverse energy and photon multiplicity, remains almost constant with increasing rho(max). Results are compared with model predictions. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

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    • Elliptic Emission of K+ and Pi+ in 158A GeV Pb+Pb Collisions

      栗田 和好

      Phys. Lett. ( B ) 15292   1 1 1999

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    • Proton And Deuteron Production In Au+Au Reactions At 11.6/A-GeV/C

      栗田 和好

      Phys. Rev. ( C60 ) 64901   1 1 1999

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    • Centrality Dependence Of Kaon Yields In Si+A And Au+Au Collisions At The Ags

      栗田 和好

      Phys. Rev. ( C60 ) 44904   1 1 1999

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    • A new polarimeter for RHIC

      栗田 和好

      Proceedings of Workshop on Polarized Protons at High Energies, DESY Hamburg, Germany   71 - 76   1 1 1999

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    • Excitation Function Of K+ And Pi+ Production In Au+Au Reactions At 2/A-GeV To 10/A-GeV

      栗田 和好

      Phys. Lett. ( B469 ) 30 - 36   1 1 1999

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    • A Forward Magnetic Spectrometer System For High-Energy Heavy-Ion Experiments

      栗田 和好

      Nucl. Instrum. Meth. ( A438 ) 282 - 301   1 1 1999

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    • 30p-PSA-18 STUDY OF TIMING DEGRADATION AND LIGHT ATTENUATION IN LONG PLASTIC SCINTILLATION RODS FOR TIME-OF-FLIGHT COUNTER IN RELATIVISTIC HEAVY ION EXPERIMENTS

      Kurata,M, Kato,S, Kumagai,A, Kurita,K, Miake,Y, Sato,S, Tomisawa,K, Ueno-Hayashi,S, Yagi,K, Nagamiya,S, Nayak,T.K, Vossnack,O, Yang,X, Zhan,W

      Abstracts of the meeting of the Physical Society of Japan. Sectional meeting1994 ( 1 ) 117   9 1994

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    • Particle Production Study in Proton-Nucleus and Central Oxygen-Nucleus Collisions at 14.5 A GeV/c Peer-reviewed

      Kazuyoshi Kurita

          2 1992

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    Misc.

    • SCRIT実験における捕獲されたイオンのモジュレーション依存性

      内田信昭, 足立江介, 市川進一, 榎園昭智, 大西哲哉, 笠間桂太, 栗田和好, 須田利美, 玉江忠明, 塚田暁, 戸ケ崎衛, 原雅弘, 藤田峻広, 堀充希, 堀利匡, 山田耕平, 若杉昌徳, 渡邊正満

      日本物理学会講演概要集(CD-ROM)73 ( 1 ) ROMBUNNO.22pK301‐11   23 3 2018

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    • The scrit electron scattering facility project at the riken ri beam factory

      T. Ohnishi, A. Enokizono, M. Hara, M. Hori, S. Ichikawa, M. Wakasugi, M. Watanabe, K. Adachi, T. Fujita, T. Hori, K. Kurita, M. Togasaki, N. Uchida, K. Yamada, T. Suda, T. Tamae, K. Tsukada

      Acta Physica Polonica B49   483 - 493   1 3 2018

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      © 2018 Jagellonian University. All rights reserved. The SCRIT electron scattering facility has been constructed at the RIKEN RI Beam Factory. The commissioning experiment was performed and the properties of the ion trapping were studied. The first electron elastic scattering experiment of132Xe was performed and the charge density distribution was obtained. The achieved luminosity in the experiment was 1:8×1027 cm-2s-1with a 250 mA electron beam current and the injection of 108 ions. The production of unstable nuclei has been started with a new online isotope separator (ISOL) system at the SCRIT facility, and developments of the ISOL system for increasing rates of unstable nuclei are underway. Electron scattering with unstable nuclei will be performed in the near future.

      DOI: 10.5506/APhysPolB.49.483

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    • First Elastic Electron Scattering from Xe 132 at the SCRIT Facility

      K. Tsukada, K. Tsukada, A. Enokizono, A. Enokizono, T. Ohnishi, K. Adachi, T. Fujita, M. Hara, M. Hori, T. Hori, S. Ichikawa, K. Kurita, K. Matsuda, T. Suda, T. Suda, T. Tamae, T. Tamae, M. Togasaki, M. Wakasugi, M. Watanabe, K. Yamada

      Physical Review Letters118   27 6 2017

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      © 2017 American Physical Society. The first elastic electron scattering has been successfully performed at the self-confining radioactive-isotope ion target (SCRIT) facility, the world&#039;s first electron scattering facility for SCRIT technique achieved high luminosity (over 1027 cm-2 s-1, sufficient for determining the nuclear shape) with only 108 target ions. While Xe132 used in this time as a target is a stable isotope, the charge density distribution was first extracted from the momentum transfer distributions of the scattered electrons by comparing the results with those calculated by a phase shift calculation.

      DOI: 10.1103/PhysRevLett.118.262501

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    • First result from SCRIT electron scattering facility: Charge density distribution of Xe

      K. Tsukada, K. Kasama, K. Namba, T. Suda, T. Tamae, M. Hara, S. Ichikawa, T. Ohnishi, M. Wakasugi, M. Watanabe, K. Adachi, A. Enokizono, T. Fujita, M. Hori, K. Kurita, S. Sasamura, M. Togasaki, N. Uchida, K. Yamada, S. Wang

      Proceedings of Science2016-September   1 1 2016

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      © Copyright owned by the author(s). We have constructed the SCRIT electron scattering facility at RIKEN in order to realize electron scattering off unstable nuclei. Because electron scattering is the most powerful and reliable tool to study the internal structure of the atomic nuclei as demonstrated for many stable nuclei in the latter half of the 20th century, actualization of electron scattering for the unstable nuclei has been long awaited. Recently, we have performed a series of elastic electron scattering experiments with132Xe target. The high luminosity of around 1027cm-2s-1which is a minimum-requirement for electron scattering is achieved with using only 108target ions. By comparing with a DWBA calculation assuming the two-parameter Fermi distribution as the nuclear charge density distribution, it is found that a root-mean-square of radius is consistent with that from the measurement of X-ray of muonic atom and an information of surface shape of132Xe nucleus is extracted for the first time.

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    • The performance of the SCRIT detectors for electron-RI scattering experiment

      A. Enokizono, K. Adachi, T. Fujita, M. Hori, K. Kurita, S. Sasamura, M. Togasaki, N. Uchida, K. Yamada, K. Kasama, K. Namba, T. Suda, T. Tamae, K. Tsukada, M. Hara, T. Hori, S. Ichikawa, T. Ohnishi, M. Wakasugi, M. Watanabe, S. Wang

      Proceedings of Science2016-September   1 1 2016

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      © Copyright owned by the author(s). The SCRIT (Self-Confining RI Ion Target) facility has been constructed at RIKEN to make the electron-RI scattering experiment possible for the first time in the world. At SCRIT, the angular momentum distribution of scattered electrons is measured by WiSES (Window-frame Spectrometer for Electron Scattering) which consists of a dipole magnet and front/rear drift chambers, covering a solid angle of ∼80 mSr with an intrinsic momentum resolution of Δp/p ∼ 10-3. Also the luminosity of the electron-RI scattering is estimated from bremsstrahlung photons measured by LMon (Luminosity Monitor) to obtain the absolute cross-section of the scattering. The LMon consists of a CsI calorimeter to measure the photon energy, and plastic fiber scintillators to measure the 2D hit distribution of the bremsstrahlung photons. In 2015-2016 the first physics experiment has been performed using132Xe target, then the luminosity and angular distributions were successfully measured at the electron beam energy of 150-300 MeV, achieving a luminosity above 1027cm-2s-1. In this article, we present the performances of the WiSES and LMon detectors obtained by using the132Xe experiment data.

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    • The SCRIT electron scattering facility project at RIKEN RI beam factory

      T. Ohnishi, A. Enokizono, M. Hara, T. Hori, S. Ichikawa, K. Kurita, S. Matsuo, T. Suda, T. Tamae, M. Togasaki, K. Tsukada, T. Tsuru, S. Wang, S. Yoneyama, M. Wakasugi

      Physica Scripta2015   1 11 2015

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      © 2015 The Royal Swedish Academy of Sciences. The self-confining RI target (SCRIT) electron scattering facility has been constructed at RIKEN RI Beam Factory. The commissioning experiment was performed, and the luminosity was achieved to around 1027cm-2s-1with stable ions at a 250 mA electron beam current. For the electron scattering with short-lived unstable nuclei, the radioactive isotope production was started at electron-beam-driven RI separator for SCRIT. Furthermore, new devices, the electron spectrometer window frame spectrometer for electron scattering and the cooler buncher system were constructed. After the setup of new devices, a first electron scattering experiment with short-lived nuclei will be performed soon.

      DOI: 10.1088/0031-8949/2015/T166/014071

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    • 29pHD-5 Development of electron-beam driven RI separator for SCRIT (ERIS) at RIBF

      Ohnishi T., Ichikawa S., Koizumi K., Adachi T., Amagai T., Hara M., Haraguchi Y., Hori T., Kitazawa R., Kurita K., Miyashita Y., Miyamoto T., Ogawara R., Suda T., Shimakura Y., Takehara H., Tamae T., Tamaki S., Togasaki M., Yanagi K., Wang S., Wakasugki M.

      Meeting abstracts of the Physical Society of Japan68 ( 1 ) 113 - 113   26 3 2013

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    • 29pHD-6 Performance study of ion trapping by the SCRIT device

      Ogawara R., Amagai T., Ichikawa S., Enokizono A., Enomoto A., Ohnishi T., Kurita K., Koizumi K., Shimakura Y., Suda T., Takehara H., Tamae T., Tamaki S., Togasaki M., Hara M., Haraguchi Y., Hori T., Miyashita Y., Miyamoto T., Yanagi K., Yamaguchi T., Wang Shuo, Wakasugi M.

      Meeting abstracts of the Physical Society of Japan68 ( 1 ) 114 - 114   26 3 2013

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    • 14aSA-8 An Ion Trapping Experiment Using the SCRIT Facility

      Togasaki M., Adachi T., Amagai T., Ichikawa S., Ohnishi T., Ogawara R., Kurita K., Suda T., Tamae T., Hara M., Hori T., Miyamoto T., Wang Shuo, Wakasugi M.

      Meeting abstracts of the Physical Society of Japan67 ( 2 ) 89 - 89   24 8 2012

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    • Progress in the R&amp;D experiments about a novel method of electron scattering off short-lived nuclei

      Shuo Wang, Shuo Wang, T. Suda, T. Suda, M. Wakasugi, T. Tamae, K. Kurita, A. Noda, T. Shirai, H. Tongu, Y. Yano

      Plasma Science and Technology14   419 - 420   1 5 2012

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      A novel method has been established to realize the experiment of electron scattering off short-lived nuclei. The method was based on the well known &quot;ion trapping&quot; phenomenon in electron storage rings. In the R&amp;D experiments at Kyoto University, stable nucleus,133Cs, was employed as the target nucleus. The luminosity of scattering experiment was nearly 1026 cm-2s-1at electron beam current around 75 mA. The angular distribution of elastically scattered electrons from trapped Cs ions was measured and the result was well fitted by theoretical calculation. It was indicated that higher luminosity can be reached with larger electron beam current.

      DOI: 10.1088/1009-0630/14/5/19

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    • 不安定核電子散乱実験のためのISOL型イオン源の性能評価

      小泉浩二, 足立竜也, 天谷達哉, 市川進一, 大西哲哉, 小川原亮, 北沢遼也, 栗田和好, 須田利美, 竹原広樹, 玉江忠明, 玉木聖一, 戸ケ崎衛, LUNDKVIST Niklas, 原雅弘, 堀利匡, 宮下裕次, 宮本嵩也, WANG Shuo, 若杉昌徳

      日本物理学会講演概要集67 ( 1 ) 116   5 3 2012

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    • SCRIT実験におけるイオン捕獲特性

      玉木聖一, 足立竜也, 天谷達哉, 市川進一, 大西哲哉, 小川原亮, 北沢僚也, 栗田和好, 小泉浩二, 須田利美, 竹原広樹, 玉江忠明, 戸ケ崎衛, LUNDKVIST Niklas, 原雅弘, 堀利匡, 宮下裕次, 宮本嵩也, WANG Shuo, 若杉昌徳

      日本物理学会講演概要集67 ( 1 ) 116   5 3 2012

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    • 自己閉じ込め法(SCRIT)による短寿命不安定核電子散乱用の磁気分析器,検出器システム

      足立竜也, 須田利美, 玉江忠明, 天谷達哉, 市川進一, 大西哲哉, 小川原亮, 北沢僚也, 栗田和好, 小泉浩二, 竹原広樹, 玉木聖一, 戸ケ崎衛, LUNDKVIST Niklas, 原雅弘, 堀利匡, 宮下裕次, 宮本嵩也, WANG Shuo, 若杉昌徳

      日本物理学会講演概要集67 ( 1 ) 116   5 3 2012

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    • 不安定核電子散乱実験のための自己閉じ込め型不安定核標的(SCRIT)を用いたイオン捕獲実験

      宮下裕次, 大西哲哉, 玉木聖一, 足立竜也, 市川進一, 大河原麻菜美, 小川原亮, 北沢僚也, 栗田和好, 小泉浩二, 須田利美, 竹原広樹, 玉江忠明, 戸ケ崎衛, LUNDKVIST Hiklas, 原雅弘, 堀利匡, SHUO Wang, 若杉昌徳

      日本物理学会講演概要集66 ( 2 ) 63   24 8 2011

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    • SCRIT:RI・電子散乱実験装置の建設

      若杉昌徳, 宮下裕次, 戸ケ崎衛, 竹原広樹, 堀利匡, 原雅弘, 市川進一, 高橋弘範, 玉木聖一, 小泉浩二, 森屋誠, 浦野恭輔, 北沢僚也, 栗田和好, 玉江忠明, 須田利美

      加速器7 ( 4 ) 271-277   31 1 2011

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    • 23aBD-5 直接反応を用いたN=20領域の中性子過剰核の高エネルギー分解能ガンマ線スペクトロスコピー(23aBD 理論核物理領域,実験核物理領域合同 不安定核II(合同),理論核物理領域)

      大田 晋輔, 橋本 佳子, 井手口 栄治, 家城 和夫, 岩佐 直仁, 岩崎 弘典, 菅野 祥子, 近藤 洋介, 久保 敏幸, 栗田 和好, 峯村 俊行, 下浦 享, 道正 新一郎, 本林 透, 村上 哲也, 中林 匠, 中村 隆司, 新倉 潤, 奥村 俊文, 大西 健夫, 櫻井 博儀, 篠原 摩有子, 青井 考, 鈴木 大介, 鈴木 賢, 玉城 充, 田中 鐘信, 栂野 泰宏, 若林 泰夫, 山田 一成, 竹下 英里, 武内 聡, 鈴木 宏, 馬場 秀忠, 福地 智則, 福井 利晃

      日本物理学会講演概要集65 ( 1 ) 60 - 60   2010

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      Language:Japanese   Publisher:一般社団法人 日本物理学会  

      DOI: 10.11316/jpsgaiyo.65.1.1.0_60_4

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    • 24aZF-3 In-beam γ-ray spectroscopy of ^<32>Mg

      Takeuchi S., Kondo Y., Kubo T., Kurita K., Minemura T., Motobayashi T., Nakabayashi T., Nakamura T., Okumura T., Onishi T.K., Ota S., Aoi N., Sakurai H., Shimoura S., Sugo R., Suzuki D., Suzuki H., Suzuki M.K., Takeshita E., Tamaki M., Tanaka K., Togano Y., Baba H., Yamada K., Fukui T., Hashimoto Y., Ieki K., Imai N., Iwasaki H., Kanno S.

      Meeting Abstracts of the Physical Society of Japan63 ( 1 ) 72 - 72   2008

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      Language:Japanese   Publisher:The Physical Society of Japan  

      DOI: 10.11316/jpsgaiyo.63.1.1.0_72_2

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    • 20aSC-12 Coulomb excitation of ^<20>Mg

      Iwasa N., Kubono S., Kurita K., Kurokawa M., Matsui N., Minemura T., Morikawa H., Nakamura T., Niikura M., Notani M., Ota S., Bishop S., Saito A., Sakurai H., Shimoura S., Sugawara K., Sugimoto T., Suzuki H., Suzuki T., Tanihata I., Takeshita E., Takeuchi S., Elekes Z., Teranishi T., Togano Y., Yamada K., Yamaguchi K., Yanagisawa Y., Motobayashi T., Gibelin J., Hosoi M., Ieki K., Ishikawa K., Iwasaki H., Kawai S.

      Meeting Abstracts of the Physical Society of Japan61 ( 0 ) 3 - 3   2006

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      Language:Japanese   Publisher:The Physical Society of Japan  

      DOI: 10.11316/jpsgaiyo.61.2.1.0_3_3

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    • 28pZL-1 Proton Inelastic Scattering on ^<16>C - 2

      Ong H.J, Fulop Zs, Gibelin J, Gomi T, Hasegawa H, Ishihara M, Iwasaki H, Kanno S, Kawai S, Kubo T, Kurita K, Imai N, Matsuyama Y, Michimasa S, Minemura T, Motobayashi T, Notani M, Ota S, Sakai H, Shimoura S, Takeshita E, Takeuchi S, Aoi N, Tamaki M, Togano Y, Yamada K, Yanagisawa Y, Yoneda K, Sakurai H, Dombradi Zs, Saito A, Elekes Z, Baba H, Demichi K

      Meeting Abstracts of the Physical Society of Japan59 ( 1 ) 40 - 40   2004

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      Language:English   Publisher:The Physical Society of Japan  

      DOI: 10.11316/jpsgaiyo.59.1.1.0_40_1

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    • αinelastic scattering of the nuetron-rich ^<22>O

      Tamaki M., Kubono S., Kurita K., Kurokawa M., Saito A., Sakurai H., Takeuchi S., Takeshita E., Notani M., Baba H., Minemura T., Shimoura S., Motobayashi T., Yanagisawa Y., Yoshida A., Iwasaki H., Michimasa S., Aoi N., Iwasa N., Ong H. J., Ota S., Kanno S.

      Meeting Abstracts of the Physical Society of Japan58 ( 2 ) 26 - 26   2003

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      Language:Japanese   Publisher:The Physical Society of Japan  

      DOI: 10.11316/jpsgaiyo.58.2.1.0_26_4

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    • Excited States in ^<23>F by One-Proton Transfer Reaction

      Michimasa S., Kubono S., Kurita K., Kurokawa M., Saito A., Sakurai H., Takeuchi S., Takeshita E., Notani M., Baba H., Minemura T., Shimoura S., Motobayashi T., Yanagisawa Y., Yoshida A., Iwasaki H., Tamaki M., Aoi N., Iwasa N., Ong H. J., Ota S., Kanno S.

      Meeting Abstracts of the Physical Society of Japan58 ( 2 ) 25 - 25   2003

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      Language:Japanese   Publisher:The Physical Society of Japan  

      DOI: 10.11316/jpsgaiyo.58.2.1.0_25_4

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    • B (E2; 0^+_<g.s.>→2^+_1) measurement of the proton-rich T = 1 nuclei ^<46>Cr, ^<50>Fe, ^<54>Ni

      Yamada K., Imai N., Iwasaki H., Kanno S., Kubo T., Kurita K., Matsuyama Y. U., Michimasa S., Minemura T., Notani M., Ohnishi T., Motobayashi T., Ong Hooi Jin, Ota S., Ozawa A., Saito A., Sakurai H., Shimoura S., Takeshita E., Takeuchi S., Tamaki M., Togano Y., Aoi N., Yanagisawa Y., Yoneda K., Tanihata I., Baba H., Demichi K., Elekes Zoltan, Gibelin Julien, Gomi T., Hasegawa H.

      Meeting Abstracts of the Physical Society of Japan58 ( 1 ) 47 - 47   2003

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      Language:Japanese   Publisher:The Physical Society of Japan  

      DOI: 10.11316/jpsgaiyo.58.1.1.0_47_3

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    • Proton Inelastic Scattering of ^<16>C

      Ong H. J., Fulop Zs., Gibelin J., Gomi T., Hasegawa H., Ishihara M., Iwasaki H., Kanno S., Kawai S., Kubo T., Kurita K., Imai N., Matsuyama Y. U., Michimasa S., Minemura T., Motobayashi T., Notani M., Ota S., Sakai H., Shimoura S., Takeshita E., Takeuchi S., Aoi N., Tamaki M., Togano Y., Yamada K., Yanagisawa Y., Yoneda K., Sakurai H., Dombradi Zs., Saito A., Elekes Z., Baba H., Demichi K.

      Meeting Abstracts of the Physical Society of Japan58 ( 1 ) 43 - 43   2003

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      Language:Japanese   Publisher:The Physical Society of Japan  

      DOI: 10.11316/jpsgaiyo.58.1.1.0_43_4

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    • Lifetime of isomeric O^+_2 state in ^<12>Be

      Demichi K., Ideguchi E., Ishihara M., Iwasa N., Iwasaki H., Kanno S., Kawai S., Kubono S., Kuboshima N., Kurita K., Kurokawa M., Shimoura S., Matsuyama Y. U., Michimasa S., Miller Kathleen, Minemura T., Murakami T., Notani M., Odahara A., Ota S., Saito A., Sakai H. K., Motobayashi T., Sakurai H., Takeshita E., Takeuchi S., Tamaki M., Teranishi T., Togano Y., Yamada K., Yanagisawa Y., Aoi N., Baba H., Elekes Z., Fukuchi T., Gomi T., Hasegawa H.

      Meeting Abstracts of the Physical Society of Japan58 ( 1 ) 42 - 42   2003

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      Language:Japanese   Publisher:The Physical Society of Japan  

      DOI: 10.11316/jpsgaiyo.58.1.1.0_42_2

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    Professional Memberships

    • 4 2016 - Present 
      Association for Physics Education of Japan

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    • 4 2012 - Present 
      科学教育研究協議会 埼玉支部

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      Physics Education Society of Japan

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      Physical Society of Japan

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    Research Projects

    • 理研SCRIT実験

      先端技術開発研究 

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      4 2003 - Present

      Grant type:Competitive

      これまで標的を作ることができなかった不安定核標的を電子蓄積リングのビームのクーロンポテンシャルと電極によるミラーポテンシャルで3次元的にトラップして電子散乱に供するSCRITの開発に成功。 その装置を用いて実際に不安定核の電子散乱で不安定原子核の構造の謎に迫る。

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    • High-precision electron scattering experiments for the advancement of the physics of unstable nuclei

      Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research 

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      4 2020 - 3 2023

      Grant number:20K04001

      Grant amount:\4290000 ( Direct Cost: \3300000 、 Indirect Cost:\990000 )

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    • RHIC PHENIX実験

      国際研究協力 

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      4 1993 - 10 2017

      Grant type:Competitive

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    • EOS for High-Density Neutron-Rich Nuclear Matter

      Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research 

      Murakami Tetsuya, TAKETANI Atsushi, MIZOI Yutaka, KURITA Kazuhiro, BABA Hidetada, Lynch W., Tsang M. B., Yennello S. J., Xiao Z., Lukasik J., Pawlowski P., Hong B., Pollacco E.

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      6 2012 - 3 2017

      Grant number:24105004

      Grant amount:\168740000 ( Direct Cost: \129800000 、 Indirect Cost:\38940000 )

      Neutron star is believed to be created as a remnant of super nova explosion. In order to determine a thermodynamical character of outer core of neutron star through terrestrial experiments we have performed a series of measurements using RIKEN Radio Isotope Beam Factory (RIBF). Various central collisions between neutron-rich tin nucleus and normal tin nucleus were measured. The density achieved by the collisions nearly corresponds to the one for the outer core of neutron star. Both positive and negative pions emitted from the high density nuclear matter were detected by a newly developed large time projection chamber which can provide 3-dimensional image of their tracks. We have successfully accumulated data with higher statistics than planned. Data analysis to extract precise yield ratios between charged pions is in progress. We expect to constrain the EOS for neutron star soon.

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    • Electron Scattering for Measurements of Charge Density Distributions of Short-Lived Nuclei

      Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research 

      Toshimi Suda, WAKASUGI MASANORI, TAMAE TADAAKI, KURITA KAZUYOSHI, MIYASHITA YUJI, ADACHI TATSUYA, ENOKIZONO TOMOAKI, TSUKADA KYO

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      4 2010 - 3 2016

      Grant number:22224004

      Grant amount:\203060000 ( Direct Cost: \156200000 、 Indirect Cost:\46860000 )

      We aim at studying the internal structures of production-hard short-lived unstable nuclei by means of electron scattering. Electron scattering is the best probe for such studies and indeed it has played consistently an essential role to reveal the detailed internal structures of many stable nuclei. An innovative technology, named SCRIT, we have invented has been demonstrated to be a way to realize never-yet-performed electron scattering off short-lived nuclei. We have completed the construction of the world’s first electron scattering facility dedicated for short-lived nuclei, and started its operation. Recently, the first physics data was obtained.

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    • 不安定核研究の精密化に向けたMRFQクーラー・バンチャーの開発

      日本学術振興会  科学研究費助成事業 

      栗田和好

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      4 2012 - 3 2015

      Authorship:Principal investigator  Grant type:Competitive

      この研究はこれまで不可能と思われて世界でも例を見ない不安定核の電子散乱実験を実現するためのイオン濃縮装置の開発である。我々はイオンを加速装置内にとどめて電子散乱を実現できることを実証したが、その蓄積イオン濃度の向上が実験の成否のカギとなる。我々は最終的に電極のエッジ効果を利用したイオントラップに方針を切り替えて、目標の半分ほどのイオン濃度を実現することに成功した。

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    • Determination of stellar reaction cross sections relevant to p-nuclei synthesis by using fast radioactive isotope beam

      Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research 

      YONEDA Ken-ichiro, TOGANO Yasuhiro, TAKETANI Atsushi, KURITA Kazuyoshi, NISHIMURA Shunji

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      2010 - 2012

      Grant number:22340072

      Grant amount:\19240000 ( Direct Cost: \14800000 、 Indirect Cost:\4440000 )

      The aim of the present study is to explore the origin of the neutron-deficient stable p-nuclei through the reaction measurements using radioactive isotope beams. For this experiment, strip-silicon detectors of a large sensitive area (~90mmx90mm) and their readout circuits are needed. In particular, the readout circuit require the large dynamic range of about 5000 and capability of high density signal processing of several thousand channels, and must be newly developed. In this study, the silicon strip detectors and readout circuits are newly designed, and succeeded to develop the circuits that satisfy the requirements.

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    • Establishment of an Experimental Method to determine Nuclear Dependence of the Nuclear Spin -flip Amplitude

      Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research 

      KURITA Kazuyoshi

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      4 2008 - 3 2011

      Grant number:20540297

      Authorship:Principal investigator  Grant type:Competitive

      The most challenging part of the R&D is to realize a detector which can measure low energy ions under extreme photon background. The design of the detector was fixed to utilize a quadrupole electric field to bend the ions by 90 degrees and to guide them into channeltrons. The construction of the detector system is under construction. It will be tested for the functionality in the electron scattering experiment at RIKEN before the polarized beam will be available.

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    • New Developments in the Investigation of the Nucleon Spin Structure with Spin Polarized Proton Collisions

      Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research 

      SAITO Naohito, MURAKAMI Tetsuya, MURATA Jiro, TAKETANI Atsushi, KURITA Kazuyoshi, TANIDA Kiyoshi

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      2006 - 2010

      Grant number:18GS0210

      Grant amount:\262860000 ( Direct Cost: \202200000 、 Indirect Cost:\60660000 )

      We have developed an event selection system for PHENIX experiment at the only polarized proton-proton collider in the world. The main purpose of the project is to understand the structure of the proton, which is the fundamental constituents of the matter, which includes ourselves, from the viewpoint of the important characteristic of an elementary particle, spin. This new system has opened a new era of the proton spin-structure studies to measure the spin polarization of sea quarks directly, by means of weak boson production in polarized proton-proton collision for the first time in the world.

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    • Electron scattering for charge density distribution measurement for unstable nuclei using the SCRIT

      Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research 

      WAKASUGI Masanori

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      2007 - 2008

      Grant number:19340073

      Grant amount:\19240000 ( Direct Cost: \14800000 、 Indirect Cost:\4440000 )

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    • 共同研究プロジェクト研究 電子ストーレジリング中での電子原子核弾性散乱実験手法の確立

      立教大学  立教大学学術推進特別重点資金(立教SFR) 

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      4 2005 - 3 2007

      Grant type:Competitive

      理化学研究所との協同研究プロジェクト

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    • 指向性γ線サーベイメータの開発

      東京都産業技術研究所・(株)クリアパレス  共同研究(国内共同研究) 

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      4 2003 - 3 2005

      Grant type:Competitive

      指向性γ線サーベイメータの開発

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    • Development of a detection system for elastic electron scattering experimente at electron storage rings

      Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research 

      SUDA Toshimi, WAKASUGI Masanori, OHNISHI Tetsuya, TAKEDA Hiroyuki, KURITA Kazuyoshi, KOSEKI Tadashi

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      2003 - 2004

      Grant number:15340090

      Grant amount:\16400000 ( Direct Cost: \16400000 )

      We have been proposing a novel scheme to realize electron-scattering experiments for internal-structure studies of short-lived radioactive isotopes(RI). This scheme, SCRIT, is based on well-known ion-trapping phenomena at electron-storage rings. With a help of this ion trapping, SCRIT forms a localized RI target on a circulating electron beam in a storage ring, and is found by a numerical simulation to provide a luminosity of more than 10^<27>/cm^2/s. This luminosity is high enough to measure the elastic scattering cross section to determine the charge distribution.
      In order to demonstrate its feasibility, a SCRIT prototype has been constructed, and installed at an existing electron storage ring, KSR, Kyoto University. A series of test measurements has been done. The test experiments conducted so far have already revealed that the SCRIT prototype does not have any negative influence on the storage-ring performances, such as the lifetime and maximum storage beam current.
      By means of extracting ions from SCRIT, we have clearly confirmed that externally injected Cs^<1+> ions were stably trapped in SCRIT about one second, as expected in a numerical simulation. The SCRIT system has been demonstrated to work as a new type of ion trap. The number of trapped ions were an order of 107, which is also in good agreement with the expectation. The growth of the charge states of detected ions strongly indicates that all trapped ions distribute inside the electron beam, since the ions inside the electron beam are continuously further ionized by the electron beam.
      In this R & D experiment, the luminosity is expected to be on the order of 102.5/cm2/s, whereas no direct evidence of this luminosity has yet been observed in the bremmstrahlung measurements. A modification of the beam transport is to be made in order to reduce the huge background for the bremsstrahlung detector. In addition, another detection system is to be installed to obtain direct evidence for the overlapping of trapped ions with the electron beam.

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    • Study of Hadron Production in High Energy Heavy Ion Reaction

      Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research 

      MIAKE Yasuo, SAKO Hiroyuki, NISHIMURA Shunji, YAGI Kohsuke, HATSUDA Tetsuo, KALECHOFSKY H.

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      1995 - 1997

      Grant number:07044060

      Grant amount:\12400000 ( Direct Cost: \12400000 )

      Data collection in 158 A GeV/c Pb+Pb collisions at CERN has been completed and the time of flight detector has been shipped to Brookhaven National Laboratory for the installation to the PHENIX experiment as is planned. Tuning, repair and modifications to the time-of-flight detector has been done where needed. System chack of the data readout for the PHENIX experiment was also crarried out.
      Major activity of this years was the data analysis. First of all, it has been confirmed from the data taken at the CERN that the time-of-flight detector has achived the timing resolution of 80 pico second as is designed. For the data analysis, we invited two collaborators from Univ of Geneve during the summer of '97, which improved the communication among the collaboration significantly and the speed of the data analysis.
      As a result, directed flow in PB+PB collisions at the energy of 158 A GeV/c has been found as a first time at this energy. The analysis of the such hydrodynamical effect, particularly, the beam energy dependence of the effect, is believed to provide important information on the equation of state of the matter, which characterizes the formation of Quark Gluon Plasma.
      The Thirteenth International Conference on Ultra-Relativistic Nucleus-Nacleus Collisions was held on December 1-5,1997 at the university hall of the university of Tsukuba. In this series of conference this was the first conference held in Asia. Kohsuke Yagi of this research group served as a chairperson, and Tetsuo Hatsuda and Yasuo Miake as scientific secretaries of this conference. Several reports were made from this group and the hydrodynamical effect at the energy of 158 A GeV/c was one of the important topics at this conference.

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    • Systematic measurement of hadron production for the study of Quark-Gluon Plasma

      Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research 

      MIAKE Yasuo, NISHIMURA Shunji, KURITA Kazuyoshi, YAGI Kohsuke, HATSUDA Tetsuo, SAKO Hiroyuki

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      1994 - 1997

      Grant number:06102004

      Grant amount:\225000000 ( Direct Cost: \225000000 )

      During the period of the birth of the Universe, it is speculated that the universe was in an unknown from of matter, called quark-gluon plasma (QGP). Unique opportunity to re-create the QGP in the laboratory is provided by high energy heavy ion collisions. Systematic study of hadron production in the collisions is essentially important for the basic understanding of the complex system, which might characterize the formation of the QGP.
      High resolution time-of flight (TOF) counters (resolution in sigma ; <85 ps), which provides the key role for the particle identification of the hadron, has been constructed. Pipeline readout circuits for high resolution TOF measurement have been developed together with Nevis Lab., Columbia University. Utilizing the TOF system, systematic measurement of the produced hadrons has been carried out in heavy ion collisions at the energy of <10 A GeV, 158A GeV and 100+100 AGeV as planned.
      Among several achievements, study of collective emissions of particles in PB+PB collisions at the energy of 158 A GeV/c is important. From an event-by-event analysis of the azimuthal correlation of protons emitted at the target rapidity region, directed flow has been observed as a first time at this energy of heavy ion collisions. The magnitude of the directed flow is found to be smaller than those observed at 10A GeV and also smaller than those predicted by RQMD model. This fact may suggest a softening of equation of state, which characterizes the formation of Quark Gluon Plasma. With respect to the reaction plane, determined from the measurement of the directed flow, azimuthal correlation of K+, pion and proton near mid-rapidity have been observed. In semi-central collisions, K+ mesons are found to be preferentially emitted out of the reaction plane while pions and protons are emitted in the reaction plane. The result suggest that the K+ emission is influenced by in-medium potential effects in addition to the collective flow effects.

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    • Research for development of a large spectrometer for Quark Gluon Plasma search

      Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research 

      YAGI Kousuke, NAYAK T, ZAJC W.A., NAGAMIYA S., KURITA Kazuyoshi, ARAI Ichirou, MIAKE Yasuo

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      1992 - 1993

      Grant number:04044031

      Grant amount:\12300000 ( Direct Cost: \12300000 )

      At very early stage of our Big Bang Universe, it is believed to have existed a hot and highly exited state of matter, called "Quark Gluon Plasma(QGP)". The goal of this research is to design a large spectrometer to detect QGP which is assumed to be recreated in high energy heavy ion collisions. At 100GeV/c per nucleon in collider mode, Au-Au collisions create over 5000 charged particles.
      We focused on the hadron channel as signatures of QGP and designed a time of flight(TOF) which is best suited for particle identification in the momentum region between 0.5 and 2.5 GeV/c. To separate pions and kaons well at 5m away from collision point, we need to achieve time resolution less than 100 ps. The shape of the scintillator was determined from the particle density to be a square rod whose width and thickness are about 1 cm and the length is 1-3 m. To accomplish the time resolution(less than 100 ps), we performed the following tests.
      *To avoid degradation of rise time of PMT signals through signal cables, we invented a discriminator which is mounted directly on a PMT. We found that rise time was shortened by 30%.
      *Selection of scintillator material and shape.
      *Position dependence of pulse height and time resolution was measured. We found pulse attenuation length is larger than time resolution degradation length by factor of 2. It means that time resolution of scintillation counter solely depends on photon statistics.
      *We constructed 100 array of TOF and obtained time resolution of 55ps. It gave us the basis of the PHENIX TOF construction. Our technique developed in this research opened possibility of utilizing an electromagnetic calorimeter as a particle identification device.

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    • 放射線計測器、粒子検出器開発

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      Grant type:Competitive

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    Social Contribution

    • University Physics Education Council

      12 2014 - Present

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