Updated on 2024/04/18

写真b

 
KASAGI Ayumi
 
*Items subject to periodic update by Rikkyo University (The rest are reprinted from information registered on researchmap.)
Affiliation*
Graduate School of Artificial Intelligence and Science Master's Program in Artificial Intelligence and Science
Title*
Assistant Professor
Degree
博士(工学) （ 3 2023   岐阜大学大学院 ）
Campus Career*
  • 4 2023 - Present 
    Graduate School of Artificial Intelligence and Science   Master's Program in Artificial Intelligence and Science   Assistant Professor
 

Awards

  • 10 2021  
    社団法人 日本物理学会  2021年秋季大会 日本物理学会学生優秀発表賞 

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  • 3 2021  
    日本物理学会第26回論文賞  Observation of a Be double-Lambda hypernucleus in the J-PARC E07 experiment
     
    J-PARC E07 collaboration

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Papers

  • Hypernuclear event detection in the nuclear emulsion with Monte Carlo simulation and machine learning Peer-reviewed

    A. Kasagi, W. Dou, V. Drozd, H. Ekawa, S. Escrig, Y. Gao, Y. He, E. Liu, A. Muneem, M. Nakagawa, K. Nakazawa, C. Rappold, N. Saito, T.R. Saito, S. Sugimoto, M. Taki, Y.K. Tanaka, A. Yanai, J. Yoshida, M. Yoshimoto, H. Wang

    Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment1056   168663 - 168663   11 2023

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

    DOI： 10.1016/j.nima.2023.168663

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  • Development of machine learning analyses with graph neural network for the WASA-FRS experiment Peer-reviewed

    H. Ekawa, W. Dou, Y. Gao, Y. He, A. Kasagi, E. Liu, A. Muneem, M. Nakagawa, C. Rappold, N. Saito, T. R. Saito, M. Taki, Y. K. Tanaka, H. Wang, J. Yoshida

    The European Physical Journal A59 ( 5 )   12 5 2023

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    Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1140/epja/s10050-023-01016-5

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    Other Link： https://link.springer.com/article/10.1140/epja/s10050-023-01016-5/fulltext.html

  • Investigation of neutron imaging applications using fine-grained nuclear emulsion Peer-reviewed

    Abdul Muneem, Junya Yoshida, Hiroyuki Ekawa, Masahiro Hino, Katsuya Hirota, Go Ichikawa, Ayumi Kasagi, Masaaki Kitaguchi, Naoto Muto, Kenji Mishima, Jameel-Un Nabi, Manami Nakagawa, Naotaka Naganawa, Takehiko R. Saito

    Journal of Applied Physics133 ( 5 ) 054902 - 054902   7 2 2023

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    Publishing type：Research paper (scientific journal)   Publisher：AIP Publishing  

    Neutron imaging is a nondestructive inspection technique that has a wide range of applications. One of the important aspects of neutron imaging is achieving a micrometer-scale spatial resolution. The development of a high-resolution neutron detector is a challenging task. As one potential solution to this task, we investigate whether neutron detectors based on fine-grained nuclear emulsions are suitable for high-resolution neutron imaging applications. High track density is necessary to improve the quality of neutron imaging. However, the available track analysis methods are difficult to apply under high track density conditions. Simulated images are used to determine the required track density for neutron imaging. A track density of the order of [Formula: see text] tracks per [Formula: see text] is sufficient to utilize neutron detectors for imaging applications. Contrast resolution was also investigated for image datasets with various track densities and neutron transmission rates. Moreover, experiments were performed for the neutron imaging of gadolinium-based gratings with known geometries. The grating structures were successfully resolved. The calculated [Formula: see text] 10%–90% edge response using the grayscale optical images of the grating slit with a periodic structure of 9 [Formula: see text]m was [Formula: see text] [Formula: see text]m.

    DOI： 10.1063/5.0131098

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  • Ξ− atomic X-ray spectroscopy using a counter-emulsion hybrid method Peer-reviewed

    M Fujita, H Ekawa, Y Endo, R Goto, S Hasegawa, S H Hayakawa, K Hayashi, R Honda, K Hoshino, K Hosomi, M Ichikawa, Y Ichikawa, H Ito, Y Ishikawa, W S Jung, A Kasagi, S H Kim, S Kinbara, H Kobayashi, T Koike, J Y Lee, P M Lin, Y Nagase, D Nakashima, K Nakazawa, T Nanamura, N Nishimura, S Nishimura, A N L Nyaw, M Ohashi, H Sako, M K Soe, H Tamura, A M M Theint, K T Tint, Y Toyama, M Ukai, T O Yamamoto, S B Yang, J Yoshida, M Yoshimoto, D Zhang

    Progress of Theoretical and Experimental Physics   25 11 2022

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    Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press (OUP)  

    Abstract

    Ξ− atomic X-ray spectroscopy is one of the most useful methods for investigation of the Ξ-nucleus strong interaction. Since the X-ray energy is shifted and/or broadened due to the Ξ-nucleus strong interaction compared to those calculated from electromagnetic interaction alone, the measurement of the energy shift, ΔE, and the width, Γ, give us information on the Ξ-nucleus potential. A serious problem in the measurement is the significant background derived from in-flight Ξ− decay. A novel method of identifying stopped Ξ− events using the nuclear emulsion was developed to realize the first Ξ− atomic X-ray spectroscopy experiment as the J-PARC E07 experiment, which also aimed at searching for ΛΛ and Ξ− hypernuclei in the emulsion. The X-rays emitted from Ξ− Br and Ξ− Ag atoms were measured using germanium detectors. No clear peaks were observed in the obtained spectra. However, we succeeded in reducing the background to 1/170 by this method employing the coincidence measurements using the nuclear emulsion and X-ray detectors.

    DOI： 10.1093/ptep/ptac156

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  • High-resolution measurement of hypernuclear events in a nuclear emulsion with hard X-ray microscopy Peer-reviewed

    A. Kasagi, K. Hayashi, P. M. Lin, K. Nakazawa, N. Nishimura, A. N. L. Nyaw, T. R. Saito, J. Yoshida, M. Yoshimoto

    The European Physical Journal A58 ( 10 )   1 10 2022

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    Authorship：Lead author   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1140/epja/s10050-022-00830-7

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    Other Link： https://rdcu.be/cWJ0V

  • Study on the reusability of fluorescent nuclear track detectors using optical bleaching Peer-reviewed

    Abdul Muneem, Junya Yoshida, Hiroyuki Ekawa, Masahiro Hino, Katsuya Hirota, Go Ichikawa, Ayumi Kasagi, Masaaki Kitaguchi, Satoshi Kodaira, Kenji Mishima, Jameel-Un Nabi, Manami Nakagawa, Michio Sakashita, Norihito Saito, Takehiko R. Saito, Satoshi Wada, Nakahiro Yasuda

    Radiation Measurements158   106863 - 106863   9 2022

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

    DOI： 10.1016/j.radmeas.2022.106863

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  • Energy Uncertainties of Charged Particles with Respect to the Density Error and Range Straggling in Nuclear Emulsion Sheet Peer-reviewed

    Phyo Myat Lin, Ayumi KASAGI, Kazuma, NAKAZAWA, Naoki NISHIMURA, Aung Nay Lin Nyaw, Junya YOSHIDA, Masahiro YOSHIMOTO

    BULLETIN OF THE SOCIETY OF PHOTOGRAPHY AND IMAGING OF JAPAN32 ( 1 ) 10 - 14   2022

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    Publishing type：Research paper (scientific journal)  

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  • Revisiting the former nuclear emulsion data for hypertriton Peer-reviewed

    E. Liu, A. Kasagi, H. Ekawa, M. Nakagawa, T. R. Saito, J. Yoshida

    The European Physical Journal A57 ( 12 )   12 2021

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media {LLC}  

    DOI： 10.1140/epja/s10050-021-00649-8

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    Other Link： https://link.springer.com/article/10.1140/epja/s10050-021-00649-8/fulltext.html

  • New directions in hypernuclear physics Peer-reviewed

    Takehiko R. Saito, Wenbou Dou, Vasyl Drozd, Hiroyuki Ekawa, Samuel Escrig, Yan He, Nasser Kalantar-Nayestanaki, Ayumi Kasagi, Myroslav Kavatsyuk, Enqiang Liu, Yue Ma, Shizu Minami, Abdul Muneem, Manami Nakagawa, Kazuma Nakazawa, Christophe Rappold, Nami Saito, Christoph Scheidenberger, Masato Taki, Yoshiki K. Tanaka, Junya Yoshida, Masahiro Yoshimoto, He Wang, Xiaohong Zhou

    Nature Reviews Physics   14 9 2021

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media {LLC}  

    DOI： 10.1038/s42254-021-00371-w

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    Other Link： https://www.nature.com/articles/s42254-021-00371-w

  • First observation of a nuclear s-state of a $\Xi$ hypernucleus, $^{15}_{\Xi}{\rm C}$ Peer-reviewed

    M Yoshimoto, J K Ahn, B Bassalleck, H Ekawa, Y Endo, M Fujita, Y Han, T Hashimoto, S H Hayakawa, K Hicks, K Hoshino, S Hoshino, S H Hwang, Y Ichikawa, M Ichikawa, K Imai, Y Ishikawa, H Kanauchi, A Kasagi, S H Kim, S Kinbara, P M Lin, T L Ma, K Miwa, A T Moe, Y Nagase, K Nakazawa, T Nanamura, M Naruki, A N L Nyaw, J Pochodzalla, H Sako, S Sato, M M Soe, M K Soe, J Y Sohn, H Takahashi, T Takahashi, H Tamura, K Tanida, A M M Theint, K T Tint, M Ukai, T O Yamamoto, S B Yang, C S Yoon, J Yoshida, D H Zhang, Z Zhang

    Progress of Theoretical and Experimental Physics2021 ( 7 )   7 2021

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    Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press (OUP)  

    Bound systems of Ξ- -14N are studied via Ξ- capture at rest followed by emission of a twin single-Λ hypernucleus in the emulsion detectors. Two events forming extremely deep Ξ- bound states were obtained by analysis of a hybrid method in the E07 experiment at J-PARC and reanalysis of the E373 experiment at KEK-PS. The decay mode of one event was assigned as Ξ- +14N → 5λHe +5λHe +4He + n. Since there are no excited states for daughter particles, the binding energy of the Ξ- hyperon, BΞ-, in the 14N nucleus was uniquely determined to be 6.27 ± 0.27MeV. Another Ξ- -14N system via the decay 9 λBe +5λHe + n brings a BΞ- value, 8.00 ± 0.77MeV or 4.96 ± 0.77MeV, where the two possible values of BΞ- correspond to the ground and the excited states of the daughter 9λ Be nucleus, respectively. Because the BΞ- values are larger than those of the previously reported events (KISO and IBUKI), which are both interpreted as the nuclear 1p state of the Ξ-14Nsystem, these newevents give the first indication of the nuclear 1s state of the Ξ hypernucleus, 15ΞC.

    DOI： 10.1093/ptep/ptab073

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  • Observation of Coulomb-Assisted Nuclear Bound State of Ξ−–N14 System Peer-reviewed

    S. H. Hayakawa, K. Agari, J. K. Ahn, T. Akaishi, Y. Akazawa, S. Ashikaga, B. Bassalleck, S. Bleser, H. Ekawa, Y. Endo, Y. Fujikawa, N. Fujioka, M. Fujita, R. Goto, Y. Han, S. Hasegawa, T. Hashimoto, T. Hayakawa, E. Hayata, K. Hicks, E. Hirose, M. Hirose, R. Honda, K. Hoshino, S. Hoshino, K. Hosomi, S. H. Hwang, Y. Ichikawa, M. Ichikawa, K. Imai, K. Inaba, Y. Ishikawa, H. Ito, K. Ito, W. S. Jung, S. Kanatsuki, H. Kanauchi, A. Kasagi, T. Kawai, M. H. Kim, S. H. Kim, S. Kinbara, R. Kiuchi, H. Kobayashi, K. Kobayashi, T. Koike, A. Koshikawa, J. Y. Lee, T. L. Ma, S. Y. Matsumoto, M. Minakawa, K. Miwa, A. T. Moe, T. J. Moon, M. Moritsu, Y. Nagase, Y. Nakada, M. Nakagawa, D. Nakashima, K. Nakazawa, T. Nanamura, M. Naruki, A. N. L. Nyaw, Y. Ogura, M. Ohashi, K. Oue, S. Ozawa, J. Pochodzalla, S. Y. Ryu, H. Sako, S. Sato, Y. Sato, F. Schupp, K. Shirotori, M. M. Soe, M. K. Soe, J. Y. Sohn, H. Sugimura, K. N. Suzuki, H. Takahashi, T. Takahashi, T. Takeda, H. Tamura, K. Tanida, A. M. M. Theint, K. T. Tint, Y. Toyama, M. Ukai, E. Umezaki, T. Watabe, K. Watanabe, T. O. Yamamoto, S. B. Yang, C. S. Yoon, J. Yoshida, M. Yoshimoto, D. H. Zhang, Z. Zhang

    Physical Review Letters126 ( 6 )   11 2 2021

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

    In an emulsion-counter hybrid experiment performed at J-PARC, a Ξ- absorption event was observed which decayed into twin single-Λ hypernuclei. Kinematic calculations enabled a unique identification of the reaction process as Ξ-+N14→BeΛ10+HeΛ5. For the binding energy of the Ξ- hyperon in the Ξ - N14 system a value of 1.27±0.21 MeV was deduced. The energy level of Ξ- is likely a nuclear 1p state which indicates a weak ΞN-ΛΛ coupling.

    DOI： 10.1103/physrevlett.126.062501

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    Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.126.062501/fulltext

  • CNN-based event classification of alpha-decay events in nuclear emulsion Peer-reviewed

    J. Yoshida, H. Ekawa, A. Kasagi, M. Nakagawa, K. Nakazawa, N. Saito, T.R. Saito, M. Taki, M. Yoshimoto

    Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment989   164930 - 164930   2 2021

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

    DOI： 10.1016/j.nima.2020.164930

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  • Observation of Double-strangeness Nuclei using Nuclear-emulsion Technology Peer-reviewed

    Aung Nay Lin Nyaw, Hiroyuki EKAWA, Manami FUJITA, Shuhei HAYAKAWA, Ayumi KASAGI, Phyo Myat Lin, Kazuma NAKAZAWA, Junya YOSHIDA, Masahiro YOSHIMOTO

    BULLETIN OF THE SOCIETY OF PHOTOGRAPHY AND IMAGING OF JAPAN30- ( 2 ) 22 - 25   2020

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    Publishing type：Research paper (scientific journal)  

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  • Trapping probability of strangeness via Xi− hyperon capture at rest in nuclear emulsion Peer-reviewed

    Aye Moh Moh Theint, Hiroyuki Ekawa, Ayumi Kasagi, Shinji Kinbara, May Sweet, Khin Than Tint, Chun Sil Yoon, Junya Yoshida, Masahiro Yoshimoto, Kazuma Nakazawa

    Progress of Theoretical and Experimental Physics2019 ( 2 )   1 2 2019

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press ({OUP})  

    DOI： 10.1093/ptep/pty147

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  • Observation of a Be double-Lambda hypernucleus in the J-PARC E07 experiment Peer-reviewed

    H Ekawa, K Agari, J K Ahn, T Akaishi, Y Akazawa, S Ashikaga, B Bassalleck, S Bleser, Y Endo, Y Fujikawa, N Fujioka, M Fujita, R Goto, Y Han, S Hasegawa, T Hashimoto, S H Hayakawa, T Hayakawa, E Hayata, K Hicks, E Hirose, M Hirose, R Honda, K Hoshino, S Hoshino, K Hosomi, S H Hwang, Y Ichikawa, M Ichikawa, M Ieiri, K Imai, K Inaba, Y Ishikawa, A Iskendir, H Ito, K Ito, W S Jung, S Kanatsuki, H Kanauchi, A Kasagi, T Kawai, M H Kim, S H Kim, S Kinbara, R Kiuchi, H Kobayashi, K Kobayashi, T Koike, A Koshikawa, J Y Lee, J W Lee, T L Ma, S Y Matsumoto, M Minakawa, K Miwa, A T Moe, T J Moon, M Moritsu, Y Nagase, Y Nakada, M Nakagawa, D Nakashima, K Nakazawa, T Nanamura, M Naruki, A N L Nyaw, Y Ogura, M Ohashi, K Oue, S Ozawa, J Pochodzalla, S Y Ryu, H Sako, Y Sasaki, S Sato, Y Sato, F Schupp, K Shirotori, M M Soe, M K Soe, J Y Sohn, H Sugimura, K N Suzuki, H Takahashi, T Takahashi, Y Takahashi, T Takeda, H Tamura, K Tanida, A M M Theint, K T Tint, Y Toyama, M Ukai, E Umezaki, T Watabe, K Watanabe, T O Yamamoto, S B Yang, C S Yoon, J Yoshida, M Yoshimoto, D H Zhang, Z Zhang

    Progress of Theoretical and Experimental Physics2019 ( 2 )   1 2 2019

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press ({OUP})  

    DOI： 10.1093/ptep/pty149

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Misc.

  • Studies of three-and four-body hypernuclei with heavy-ion beams, nuclear emulsions and machine learning Peer-reviewed

    T.R. Saito, P. Achenbach, H. Alibrahim Alfaki, F. Amjad, M. Armstrong, K.-H. Behr, J. Benlliure, Z. Brencic, T. Dickel, V. Drozd, S. Dubey, H. Ekawa, S. Escrig, M. Feijoo-Fontán, Y. Gao, H. Geissel, F. Goldenbaum, A. Grãna González, E. Haettner, M. N. Harakeh, Y. He, H. Heggen, C. Hornung, N. Hubbard, K. Itahashi, N. Kalantar-Nayestanaki, A. Kasagi, M. Kavatsyuk, E. Kazantseva, A. Khreptak, R. Knoebel, H. Kollmus, D. Kostyleva, S. Kraft-Bermuth, N. Kurz, E. Liu, S. Minami, D. J. Morrissey, P. Moskal, I. Mukha, A. Muneem, M. Nakagawa, K. Nakazawa, C. Nociforo, H. J. Ong, S. Pietri, J. Pochodzalla, S. Purushothaman, C. Rappold, E. Rocco, J. L. Rodríguez-Sánchez, P. Roy, R. Ruber, N. Saito, S. Schadmand, C. Scheidenberger, P. Schwarz, R. Sekiya, V. Serdyuk, M. Skurzok, B. Streicher, S. Sugimoto, K. Suzuki, B. Szczepanczyk, M. Taki, Y. K. Tanaka, X. Tang, N. Tortorelli, M. Vencelj, H. Wang, T. Weber, H. Weick, M. Will, K. Wimmer, A. Yamamoto, A. Yanai, J. Yoshida, M. Yoshimoto, J. Zhao

    Journal of Physics: Conference Series2586 ( 1 ) 012148 - 012148   1 9 2023

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    Publisher：IOP Publishing  

    Abstract

    Interests on few-body hypernuclei have been increased by recent results of experiments employing relativistic heavy ion beams. Some of the experiments have revealed that the lifetime of the lightest hypernucleus, hypertriton, is significantly shorter than 263 ps which is expected by considering the hypertriton to be a weakly-bound system. The STAR collaboration has also measured the hypertriton binding energy, and the deduced value is contradicting to its formerly known small binding energy. These measurements have indicated that the fundamental physics quantities of the hypertriton such as its lifetime and binding energy have not been understood, therefore, they have to be measured very precisely. Furthermore, an unprecedented Λnn bound state observed by the HypHI collaboration has to be studied in order to draw a conclusion whether or not such a bound state exists. These three-body hypernuclear states are studied by the heavy-ion beam data in the WASA-FRS experiment and by analysing J-PARC E07 nuclear emulsion data with machine learning.

    DOI： 10.1088/1742-6596/2586/1/012148

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    Other Link： https://iopscience.iop.org/article/10.1088/1742-6596/2586/1/012148/pdf

  • The WASA-FRS project at GSI and its perspective Peer-reviewed

    T.R. Saito, P. Achenbach, H. Alibrahim Alfaki, F. Amjad, M. Armstrong, K.-H. Behr, J. Benlliure, Z. Brencic, T. Dickel, V. Drozd, S. Dubey, H. Ekawa, S. Escrig, M. Feijoo-Fontán, H. Fujioka, Y. Gao, H. Geissel, F. Goldenbaum, A. Graña González, E. Haettner, M.N. Harakeh, Y. He, H. Heggen, C. Hornung, N. Hubbard, K. Itahashi, M. Iwasaki, N. Kalantar-Nayestanaki, A. Kasagi, M. Kavatsyuk, E. Kazantseva, A. Khreptak, B. Kindler, R. Knoebel, H. Kollmus, D. Kostyleva, S. Kraft-Bermuth, N. Kurz, E. Liu, B. Lommel, V. Metag, S. Minami, D.J. Morrissey, P. Moskal, I. Mukha, A. Muneem, M. Nakagawa, K. Nakazawa, C. Nociforo, H.J. Ong, S. Pietri, J. Pochodzalla, S. Purushothaman, C. Rappold, E. Rocco, J.L. Rodríguez-Sánchez, P. Roy, R. Ruber, S. Schadmand, C. Scheidenberger, P. Schwarz, R. Sekiya, V. Serdyuk, M. Skurzok, B. Streicher, K. Suzuki, B. Szczepanczyk, Y.K. Tanaka, X. Tang, N. Tortorelli, M. Vencelj, H. Wang, T. Weber, H. Weick, M. Will, K. Wimmer, A. Yamamoto, A. Yanai, J. Yoshida, J. Zhao

    Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms542   22 - 25   9 2023

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    Publisher：Elsevier BV  

    DOI： 10.1016/j.nimb.2023.05.042

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  • WASA-FRS Experiments in FAIR Phase-0 at GSI Peer-reviewed

    Y.K. Tanaka, P. Achenbach, H. Alibrahim Alfaki, F. Amjad, M. Armstrong, K.-H. Behr, J. Benlliure, Z. Brencic, T. Dickel, V. Drozd, S. Dubey, H. Ekawa, S. Escrig, M. Feijoo-Fontán, H. Fujioka, Y. Gao, H. Geissel, F. Goldenbaum, A. Graña González, E. Haettner, M.N. Harakeh, Y. He, H. Heggen, C. Hornung, N. Hubbard, K. Itahashi, M. Iwasaki, N. Kalantar-Nayestanaki, A. Kasagi, M. Kavatsyuk, E. Kazantseva, A. Khreptak, B. Kindler, R. Knoebel, H. Kollmus, D. Kostyleva, S. Kraft-Bermuth, N. Kurz, E. Liu, B. Lommel, V. Metag, S. Minami, D.J. Morrissey, P. Moskal, I. Mukha, A. Muneem, M. Nakagawa, K. Nakazawa, C. Nociforo, H.J. Ong, S. Pietri, J. Pochodzalla, S. Purushothaman, C. Rappold, E. Rocco, J.L. Rodríguez-Sánchez, P. Roy, R. Ruber, T.R. Saito, S. Schadmand, C. Scheidenberger, P. Schwarz, R. Sekiya, V. Serdyuk, M. Skurzok, B. Streicher, K. Suzuki, B. Szczepanczyk, X. Tang, N. Tortorelli, M. Vencelj, H. Wang, T. Weber, H. Weick, M. Will, K. Wimmer, A. Yamamoto, A. Yanai, J. Yoshida, J. Zhao

    Acta Physica Polonica B Proceedings Supplement16 ( 4 ) 1 - 1   2023

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    Publishing type：Article, review, commentary, editorial, etc. (international conference proceedings)   Publisher：Jagiellonian University  

    DOI： 10.5506/aphyspolbsupp.16.4-a27

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  • Precise measurement on the binding energy of hypertriton from the nuclear emulsion data using analysis with machine learning Peer-reviewed

    Ayumi Kasagi, Enqiang Liu, Manami Nakagawa, Hiroyuki Ekawa, Junya Yoshida, Wenbo Dou, Abdul Muneem, Kazuma Nakazawa, Christophe Rappold, Nami Saito, Takehiko Saito, Masato Taki, Yoshiki Tanaka, He Wang

    Suplemento de la Revista Mexicana de Física3 ( 3 )   1 6 2022

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    Authorship：Lead author   Publishing type：Article, review, commentary, editorial, etc. (international conference proceedings)   Publisher：Sociedad Mexicana de Fisica A C  

    A machine learning model has been developed to search events of production and decay of a hypertriton in nuclear emulsion data, which is used for measuring the binding energy of the hypertriton at the best precision. The developed model employs an established technique for object detection and is trained with surrogate images generated by Monte Carlo simulations and image transfer techniques. The first hypertriton event has already been detected with the developed method only with 10−4 of the total emulsion data. It implies that a sufficient number of hypertriton events will soon be detected for the precise measurement of the hypertriton binding energy.

    DOI： 10.31349/suplrevmexfis.3.0308122

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  • The Ξ<sup>-</sup>atomic X-ray measurement using a nuclear emulsion

    藤田真奈美, 江川弘行, 早川修平, 細見健二, 笠置歩, 小池武志, 仲澤和馬, 仲澤和馬, 西村直己, 田村裕和, 田村裕和, 谷田聖, 鵜養美冬, 山本剛史, 吉田純也, 吉本雅浩

    日本物理学会講演概要集(CD-ROM)77 ( 1 )   2022

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  • Unique approach for precise determination of binding energies of hypernuclei with nuclear emulsion and machine learning Peer-reviewed

    Manami Nakagawa, Ayumi Kasagi, Enqiang Liu, Hiroyuki Ekawa, Junya Yoshida, Wenbo Dou, Yan He, Abdul Muneem, Kazuma Nakazawa, Christophe Rappold, Nami Saito, Takehiko R. Saito, Shohei Sugimoto, Masato Taki, Yoshiki K. Tanaka, He Wang, Yiming Gao, Ayari Yanai, Masahiro Yoshimoto

    EPJ Web of Conferences271   11006 - 11006   2022

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    Publisher：EDP Sciences  

    Hypertriton is the lightest hypernucleus and a benchmark in hypernuclear physics. However, it has recently been suggested that its lifetime and binding energy values may differ from the established values. To solve this puzzle, it is necessary to measure both values with a higher precision. For the precise measurement of the binding energy, we are aiming at developing a novel technique to measure the hypertriton binding energy with unprecedented accuracy by combining nuclear emulsion data and machine learning techniques. The analysis will be based on the J-PARC E07 nuclear emulsion data. Furthermore, a machine-learning model is being developed to identify other single and double-strangeness hypernuclei.

    DOI： 10.1051/epjconf/202227111006

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  • J-PARC E07: Systematic Study of Double Strangeness System with Hybrid Emulsion Method Peer-reviewed

    J. Yoshida, K. Agari, J. K. Ahn, T. Akaishi, Y. Akazawa, S. Ashikaga, B. Bassalleck, S. Bleser, H. Ekawa, Y. Endo, Y. Fujikawa, N. Fujioka, M. Fujita, R. Goto, Y. Han, S. Hasegawa, T. Hashimoto, S. H. Hayakawa, T. Hayakawa, E. Hayata, K. Hicks, E. Hirose, M. Hirose, R. Honda, K. Hoshino, S. Hoshino, K. Hosomi, S. H. Hwang, Y. Ichikawa, M. Ichikawa, M. Ieiri, K. Imai, K. Inaba, Y. Ishikawa, A. Iskendir, H. Ito, K. Ito, W. S. Jung, S. Kanatsuki, H. Kanauchi, A. Kasagi, T. Kawai, M. H. Kim, S. H. Kim, S. Kinbara, R. Kiuchi, H. Kobayashi, K. Kobayashi, T. Koike, A. Koshikawa, J. Y. Lee, J. W. Lee, T. L. Ma, S. Y. Matsumoto, M. Minakawa, K. Miwa, A. T. Moe, T. J. Moon, M. Moritsu, Y. Nagase, Y. Nakada, M. Nakagawa, D. Nakashima, K. Nakazawa, T. Nanamura, M. Naruki, A. N. L. Nyaw, Y. Ogura, M. Ohashi, K. Oue, S. Ozawa, J. Pochodzalla, S. Y. Ryu, H. Sako, Y. Sasaki, S. Sato, Y. Sato, F. Schupp, K. Shirotori, M. M. Soe, M. K. Soe, J. Y. Sohn, H. Sugimura, K. N. Suzuki, H. Takahashi, T. Takahashi, Y. Takahashi, T. Takeda, H. Tamura, K. Tanida, A. M. M. Theint, K. T. Tint, Y. Toyama, M. Ukai, E. Umezaki, T. Watabe, K. Watanabe, T. O. Yamamoto, S. B. Yang, C. S. Yoon, M. Yoshimoto, D. H. Zhang, Z. Zhang

    Proceedings of the 3rd J-PARC Symposium (J-PARC2019)   26 3 2021

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    Publisher：Journal of the Physical Society of Japan  

    DOI： 10.7566/jpscp.33.011112

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  • The second period of event hunting in the J-PARC E07

    吉田純也, 早川修平, 江川弘行, 吉本雅浩, 笠置歩, LIN Ma Phyo Myat, NYAW Aung Nay Lin, 仲澤和馬, 仲澤和馬

    日本物理学会講演概要集(CD-ROM)75 ( 1 )   2020

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  • Analysis of Twin hypernuclei detected in the J-PARC E07 experiment

    笠置歩, 笠置歩, 仲澤和馬, 吉本雅浩, NYAW Aung Nay Lin, LIN Phyo Myat, 西村直己, 吉田純也, 吉田純也, 齋藤武彦, 齋藤武彦, 齋藤武彦, 江川弘行, 中川真奈美, MUNEEM Abdul, MUNEEM Abdul, LIU Enqiang, LIU Enqiang, LIU Enqiang, 藤田真奈美, 藤田真奈美, 早川修平

    日本物理学会講演概要集(CD-ROM)75 ( 2 )   2020

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  • Operation Steps for Data Analysis on Double Hypernuclei in E07 Experiment Peer-reviewed

    Aung Nay Lin Nyaw, Hiroyuki Ekawa, Shuhei Hayakawa, Ayumi Kasagi, Kazuma Nakazawa, Junya Yoshida, Masahiro Yoshimoto

    Proceedings of the 8th International Conference on Quarks and Nuclear Physics (QNP2018)   8 11 2019

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    Publisher：Journal of the Physical Society of Japan  

    DOI： 10.7566/jpscp.26.031017

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  • Status of the J-PARC E07, Systematic Study of Double Strangeness Nuclei with the Hybrid Emulsion Method Peer-reviewed

    J. Yoshida, K. Agari, J. K. Ahn, T. Akaishi, Y. Akazawa, S. Ashikaga, B. Bassalleck, S. Bleser, H. Ekawa, Y. Endo, Y. Fujikawa, N. Fujioka, M. Fujita, R. Goto, Y. Han, S. Hasegawa, T. Hashimoto, S. H. Hayakawa, T. Hayakawa, E. Hayata, K. Hicks, E. Hirose, M. Hirose, R. Honda, K. Hoshino, S. Hoshino, K. Hosomi, S. H. Hwang, Y. Ichikawa, M. Ichikawa, M. Ieiri, K. Imai, K. Inaba, Y. Ishikawa, A. Iskendir, H. Ito, K. Ito, W. S. Jung, S. Kanatsuki, H. Kanauchi, A. Kasagi, T. Kawai, M. H. Kim, S. H. Kim, S. Kinbara, R. Kiuchi, H. Kobayashi, K. Kobayashi, T. Koike, A. Koshikawa, J. Y. Lee, J. W. Lee, T. L. Ma, S. Y. Matsumoto, M. Minakawa, K. Miwa, A. T. Moe, T. J. Moon, M. Moritsu, Y. Nagase, Y. Nakada, M. Nakagawa, D. Nakashima, K. Nakazawa, T. Nanamura, M. Naruki, A. N. L. Nyaw, Y. Ogura, M. Ohashi, K. Oue, S. Ozawa, J. Pochodzalla, S. Y. Ryu, H. Sako, Y. Sasaki, S. Sato, Y. Sato, F. Schupp, K. Shirotori, M. M. Soe, M. K. Soe, J. Y. Sohn, H. Sugimura, K. N. Suzuki, H. Takahashi, T. Takahashi, Y. Takahashi, T. Takeda, H. Tamura, K. Tanida, A. M. M. Theint, K. T. Tint, Y. Toyama, M. Ukai, E. Umezaki, T. Watabe, K. Watanabe, T. O. Yamamoto, S. B. Yang, C. S. Yoon, M. Yoshimoto, D. H. Zhang, Z. Zhang

    Proceedings of the 8th International Conference on Quarks and Nuclear Physics (QNP2018)2130   8 11 2019

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    Language：English   Publisher：Journal of the Physical Society of Japan  

    J-PARC E07 is the most complex emulsion experiment to date investigating double hypernuclei with a hybrid emulsion method. This experiment aims to detect 10(4) Xi(-) stop events, ten times more events than the past experiments. Thus, an unequivocal identification of several new double hypernuclei is expected. The beam exposure has been completed at the K1.8 beam line of the J-PARC hadron facility in June 2017. The photographic development of all emulsion sheets has also been completed in February 2018. The emulsion sheets are presently being analyzed with dedicated optical microscopes. Current statistics is comparable to that of E373 and so far 10 events of 3-vertices topology have been detected. A typical event of double. hypernucleus and a twin. hypernucleus are introduced. We plan to complete the main part of the emulsion scanning within a year.

    DOI： 10.7566/jpscp.26.023006

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  • J-PARC E07の解析状況

    吉田純也, 江川弘行, 江川弘行, 早川修平, 早川修平, 笠置歩, 西村森, NYAW Aung Nay Lin, 吉本雅浩, 仲澤和馬, 仲澤和馬

    日本物理学会講演概要集(CD-ROM)74 ( 1 )   2019

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  • J-PARC E07の解析状況

    吉田純也, 早川修平, 江川弘行, 吉本雅浩, 笠置歩, LIN Phyo Myat, NYAW Aung Nay Lin, 仲澤和馬, 仲澤和馬

    日本物理学会講演概要集(CD-ROM)74 ( 2 )   2019

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Research Projects

  • 高速軽量物体検出ネットワークによる写真乾板中のハイパー核事象リアルタイム探索

    日本学術振興会  科学研究費助成事業 

    笠置 歩

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    8 2023 - 3 2025

    Grant number：23K19051

    Grant amount：\2860000 （ Direct Cost: \2200000 、 Indirect Cost：\660000 ）

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