
PPN meets EFT of dark energy: postNewtonian approximation in higherorder scalartensor theories
Jin Saito, Zhibang Yao, Tsutomu Kobayashi
Journal of Cosmology and Astroparticle Physics2024
(
06
)
040

040
1 6 2024

Weakfield regime of scalartensor theories with an instantaneous mode
Tsutomu Kobayashi, Takashi Hiramatsu
Physical Review D109
(
6
)
29 3 2024

Black hole perturbations in spatially covariant gravity with just two tensorial degrees of freedom
Jin Saito, Tsutomu Kobayashi
Physical Review D108
(
10
)
27 11 2023

First test of the consistency relation for the largescale structure using the anisotropic threepoint correlation function of BOSS DR12 galaxies
Naonori S Sugiyama, Daisuke Yamauchi, Tsutomu Kobayashi, Tomohiro Fujita, Shun Arai, Shin’ichi Hirano, Shun Saito, Florian Beutler, HeeJong Seo
Monthly Notices of the Royal Astronomical Society524
(
2
)
1651

1667
28 6 2023

New constraints on cosmological modified gravity theories from anisotropic threepoint correlation functions of BOSS DR12 galaxies
Naonori S Sugiyama, Daisuke Yamauchi, Tsutomu Kobayashi, Tomohiro Fujita, Shun Arai, Shin’ichi Hirano, Shun Saito, Florian Beutler, HeeJong Seo
Monthly Notices of the Royal Astronomical Society523
(
2
)
3133

3191
18 5 2023

Cosmological gravity probes: connecting recent theoretical developments to forthcoming observations
Shun Arai, Katsuki Aoki, Yuji Chinone, Rampei Kimura, Tsutomu Kobayashi, Hironao Miyatake, Daisuke Yamauchi, Shuichiro Yokoyama, Kazuyuki Akitsu, Takashi Hiramatsu, Shin’ichi Hirano, Ryotaro Kase, Taishi Katsuragawa, Yosuke Kobayashi, Toshiya Namikawa, Takahiro Nishimichi, Teppei Okumura, Maresuke Shiraishi, Masato Shirasaki, Tomomi Sunayama, Kazufumi Takahashi, Atsushi Taruya, Junsei Tokuda
Progress of Theoretical and Experimental Physics2023
(
7
)
27 4 2023

Consistency of higher derivative couplings to matter fields in scalartensor gravity
Tact Ikeda, Kazufumi Takahashi, Tsutomu Kobayashi
7 2 2023

How does SU($N$)natural inflation isotropize the universe?
Tomoaki Murata, Tomohiro Fujita, Tsutomu Kobayashi
17 11 2022

Testing gravity with the cosmic microwave background: constraints on modified gravity with two tensorial degrees of freedom
Takashi Hiramatsu, Tsutomu Kobayashi
Journal of Cosmology and Astroparticle Physics2022
(
07
)
040

040
1 7 2022

Distinguishing modified gravity with just two tensorial degrees of freedom from general relativity: Black holes, cosmology, and matter coupling
Aya Iyonaga, Tsutomu Kobayashi
22 9 2021

Stars disformally coupled to a shiftsymmetric scalar field
Tact Ikeda, Aya Iyonaga, Tsutomu Kobayashi
29 7 2021

Dynamics of inflation with mutually orthogonal vector fields in a closed universe
Tomoaki Murata, Tsutomu Kobayashi
15 7 2021

The isotropic attractor solution of axionSU(2) inflation: Universal isotropization in Bianchi typeI geometry
Ira Wolfson, Azadeh Maleknejad, Tomoaki Murata, Eiichiro Komatsu, Tsutomu Kobayashi
12 5 2021

Gravitational waves in Kasner spacetimes and Rindler wedges in ReggeWheeler gauge: Formulation of Unruh effect
Yuuki Sugiyama, Kazuhiro Yamamoto, Tsutomu Kobayashi
Physical Review D103
(
8
)
4 2021

Perturbations and quasinormal modes of black holes with timedependent scalar hair in shiftsymmetric scalartensor theories
Keitaro Tomikawa, Tsutomu Kobayashi
11 1 2021

UV sensitive oneloop matter power spectrum in degenerate higherorder scalartensor theories
Shin’ichi Hirano, Tsutomu Kobayashi, Daisuke Yamauchi, Shuichiro Yokoyama
Physical Review D102
(
10
)
4 11 2020

Nanohertz gravitational waves from NEC violation in the early universe
Hiroaki W. H. Tahara, Tsutomu Kobayashi
3 11 2020

Primordial tensor nonGaussianities from general singlefield inflation with nonBunchDavies initial states
Shingo Akama, Shin’ichi Hirano, Tsutomu Kobayashi
Physical Review D102
(
2
)
6 7 2020

Extended cuscuton as dark energy
Peerreviewed
Aya Iyonaga, Kazufumi Takahashi, Tsutomu Kobayashi
Journal of Cosmology and Astroparticle Physics2020
(
07
)
004

004
2 7 2020

A new mechanism for freezing extra dimensions with higherorder curvature terms
Hiroaki W. H. Tahara, Tsutomu Kobayashi, Jun'ichi Yokoyama
29 5 2020

Effective scalartensor description of regularized Lovelock gravity in four dimensions
Tsutomu Kobayashi
28 3 2020

Primordial nonGaussianities of scalar and tensor perturbations in general bounce cosmology: Evading the nogo theorem
Shingo Akama, Shin’ichi Hirano, Tsutomu Kobayashi
Physical Review D101
(
4
)
21 2 2020

Revisiting slowroll dynamics and the tensor tilt in general singlefield inflation
Yosuke Mishima, Tsutomu Kobayashi
5 11 2019

Relativistic stars in a cubic Galileon Universe
Peerreviewed
Hiromu Ogawa, Tsutomu Kobayashi, Kazuya Koyama
5 11 2019

On the screening mechanism in degenerate higherorder scalartensor theories evading gravitational wave constraints
Peerreviewed
Shin'ichi Hirano, Tsutomu Kobayashi, Daisuke Yamauchi
Physical Review D99
(
104073
)
5 2019

Constraining degenerate higherorder scalartensor theories with density perturbations at linear order
Peerreviewed
Shin'ichiro Hirano, Tsutomu Kobayashi, Daisuke Yamauchi, Shuichiro Yokoyama
Physical Review D99
(
104051
)
5 2019

On the screening mechanism in DHOST theories evading gravitational wave constraints
Shin'ichi Hirano, Tsutomu Kobayashi, Daisuke Yamauchi
Phys. Rev. D 99, 104073 (2019)99
(
10
)
20 3 2019

Constraining DHOST theories with linear growth of matter density fluctuations
Shin'ichi Hirano, Tsutomu Kobayashi, Daisuke Yamauchi, Shuichiro Yokoyama
Phys. Rev. D 99, 104051 (2019)99
(
10
)
8 2 2019

Horndeski theory and beyond: a review
Tsutomu Kobayashi
22 1 2019

Generalized 2D dilaton gravity and KGB
Kazufumi Takahashi, Tsutomu Kobayashi
Class. Quant. Grav. 36 (2019) no.9, 09500336
(
9
)
095003

095003
21 12 2018

General theory of cosmological perturbations in open and closed universes from the Horndeski action
Shingo Akama, Tsutomu Kobayashi
Phys. Rev. D 99, 043522 (2019)
3 10 2018

Extended Cuscuton: Formulation
Aya Iyonaga, Kazufumi Takahashi, Tsutomu Kobayashi
JCAP 12 (2018) 0022018
(
12
)
002

002
28 9 2018

Parityviolating gravity and GW170817
Atsushi Nishizawa, Tsutomu Kobayashi
Phys. Rev. D 98, 124018 (2018)
4 9 2018

Selfanisotropizing inflationary universe in Horndeski theory and beyond
Hiroaki W, H. Tahara, Sakine Nishi, Tsutomu Kobayashi, Jun'ichi Yokoyama
JCAP07(2018)058
1 5 2018

Relativistic stars in degenerate higherorder scalartensor theories after GW170817
Tsutomu Kobayashi, Takashi Hiramatsu
Phys. Rev. D 97, 104012 (2018)97
(
10
)
28 3 2018

Antiscreening of the Galileon force around a disk center hole
Hiromu Ogawa, Takashi Hiramatsu, Tsutomu Kobayashi
14 2 2018

Matter bispectrum beyond Horndeski
Shin'ichi Hirano, Tsutomu Kobayashi, Hiroyuki Tashiro, Shuichiro Yokoyama
Phys. Rev. D 97, 103517 (2018)97
(
10
)
24 1 2018

Black hole perturbation in the most general scalartensor theory with secondorder field equations: The oddparity sector (vol 85, 084025, 2012)
Tsutomu Kobayashi, Hayato Motohashi, Teruaki Suyama
PHYSICAL REVIEW D96
(
10
)
11 2017

Extended mimetic gravity: Hamiltonian analysis and gradient instabilities
Kazufumi Takahashi, Tsutomu Kobayashi
JCAP11(2017)038
(
11
)
10 8 2017

Healthy imperfect dark matter from effective theory of mimetic cosmological perturbations
Shin'ichi Hirano, Sakine Nishi, Tsutomu Kobayashi
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(
7
)
20 4 2017

General invertible transformation and physical degrees of freedom
Kazufumi Takahashi, Hayato Motohashi, Teruaki Suyama, Tsutomu Kobayashi
Phys. Rev. D 95, 084053 (2017)95
(
8
)
7 2 2017

Generalized multiGalileons, covariantized new terms, and the nogo theorem for nonsingular cosmologies
Shingo Akama, Tsutomu Kobayashi
Phys. Rev. D 95, 064011 (2017)95
(
6
)
11 1 2017

Anisotropic inflation in Horndeski theory
Sakine Nishi, Tsutomu Kobayashi, Hiroaki W.H. Tahara, Jun'ichi Yokoyama
Proceedings of the 27th Workshop on General Relativity and Gravitation in Japan, JGRG 20172
271

281
2017

Scaleinvariant perturbations from NEC violation: A new variant of Galilean Genesis
Sakine Nishi, Tsutomu Kobayashi
Phys. Rev. D 95, 064001 (2017)95
(
6
)
7 11 2016

Generic instabilities of nonsingular cosmologies in Horndeski theory: a nogo theorem
Tsutomu Kobayashi
Phys. Rev. D 94, 043511 (2016)94
(
4
)
19 6 2016

Ultra slowroll Ginflation
Shin'ichi Hirano, Tsutomu Kobayashi, Shuichiro Yokoyama
Phys. Rev. D 94, 103515 (2016)94
(
10
)
1 4 2016

Reheating and Primordial Gravitational Waves in Generalized Galilean Genesis
Sakine Nishi, Tsutomu Kobayashi
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(
4
)
25 1 2016

20pAT10 Universal instability of hairy black holes in LovelockGalileon theories in D dimensions
Takahashi K., Suyama T., Kobayashi T.
Meeting Abstracts of the Physical Society of Japan71
470

470
2016

Primordial nonGaussianities of gravitational waves beyond Horndeski
Yuji Akita, Tsutomu Kobayashi
Phys. Rev. D 93, 043519 (2016)93
(
4
)
4 12 2015

Universal instability of hairy black holes in LovelockGalileon theories in D dimensions
Kazufumi Takahashi, Teruaki Suyama, Tsutomu Kobayashi
Phys. Rev. D 93, 064068 (2016)93
(
6
)
19 11 2015

Suppressing the primordial tensor amplitude without changing the scalar sector in quadratic curvature gravity
Peerreviewed
Kohji Yajima, Tsutomu Kobayashi
Physical Review D  Particles, Fields, Gravitation and Cosmology92
(
10
)
3 11 2015

Instability of hairy black holes in shiftsymmetric Horndeski theories
Hiromu Ogawa, Tsutomu Kobayashi, Teruaki Suyama
Phys. Rev. D 93, 064078 (2016)93
(
6
)
26 10 2015

Perturbations of Cosmological and Black Hole Solutions in Massive gravity and Bigravity
Tsutomu Kobayashi, Masaru Siino, Masahide Yamaguchi, Daisuke Yoshida
8 9 2015

Suppressing the primordial tensor amplitude without changing the scalar sector in quadratic curvature gravity
Kohji Yajima, Tsutomu Kobayashi
Phys. Rev. D 92, 103503 (2015)92
(
10
)
29 8 2015

Removing Ostrogradski's ghost from cosmological perturbations in $f(R,R_{μν}^2,C_{μνρσ}^2)$ gravity
Yuji Akita, Tsutomu Kobayashi
MODERN PHYSICS LETTERS A31
(
11
)
3 7 2015

The most general secondorder field equations of biscalartensor theory in four dimensions
Seiju Ohashi, Norihiro Tanahashi, Tsutomu Kobayashi, Masahide Yamaguchi
JHEP 1507:008,2015
22 5 2015

Galilean Creation of the Inflationary Universe
Tsutomu Kobayashi, Masahide Yamaguchi, Jun'ichi Yokoyama
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(
7
)
22 4 2015

Generalized Galilean Genesis
Sakine Nishi, Tsutomu Kobayashi
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(
3
)
12 1 2015

Large scale suppression with ultra slowroll inflation scenario
Shinichi Hirano, Tsutomu Kobayashi, Shuichiro Yokoyama
Proceedings of the 25th Workshop on General Relativity and Gravitation in Japan, JGRG 20155
1247

1248
2015

Black hole perturbation in modified gravity theories
Peerreviewed
Hayato Motohashi, Tsutomu Kobayashi, Teruaki Suyama
The 13th Marcel Grossmann Meeting: On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories  Proceedings of the MG13 Meeting on General Relativity, 2012
(
210699
)
1295

1297
2015

Covariant Stückelberg analysis of de RhamGabadadzeTolley massive gravity with a general fiducial metric
Peerreviewed
Xian Gao, Tsutomu Kobayashi, Masahide Yamaguchi, Daisuke Yoshida
Physical Review D  Particles, Fields, Gravitation and Cosmology90
(
12
)
24 12 2014

Breaking of Vainshtein screening in scalartensor theories beyond Horndeski
Tsutomu Kobayashi, Yuki Watanabe, Daisuke Yamauchi
Phys. Rev. D 91, 064013 (2015)91
(
6
)
15 11 2014

Covariant St?ckelberg analysis of de RhamGabadadzeTolley massive gravity with a general fiducial metric
Xian Gao, Tsutomu Kobayashi, Masahide Yamaguchi, Daisuke Yoshida
Phys. Rev. D 90, 124073 (2014)90
(
12
)
9 9 2014

Black hole perturbation in the most general scalartensor theory with secondorder field equations. II. The evenparity sector
Peerreviewed
Tsutomu Kobayashi, Hayato Motohashi, Teruaki Suyama
Physical Review B  Condensed Matter and Materials Physics89
(
16
)
28 4 2014

Black hole perturbation in the most general scalartensor theory with secondorder field equations. II. the evenparity sector
Peerreviewed
Tsutomu Kobayashi, Hayato Motohashi, Teruaki Suyama
Physical Review B  Condensed Matter and Materials Physics89
(
16
)
28 4 2014

Black hole perturbation in the most general scalartensor theory with secondorder field equations. II. the evenparity sector
Peerreviewed
Tsutomu Kobayashi, Hayato Motohashi, Teruaki Suyama
Physical Review D  Particles, Fields, Gravitation and Cosmology89
(
8
)
9 4 2014

Exact black hole solutions in shift symmetric scalartensor theories
Tsutomu Kobayashi, Norihiro Tanahashi
PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS
(
7
)
18 3 2014

Black hole perturbation in the most general scalartensor theory with secondorder field equations II: the evenparity sector
Tsutomu Kobayashi, Hayato Motohashi, Teruaki Suyama
Phys. Rev. D 89, 084042 (2014)89
(
8
)
27 2 2014

Cosmological matching conditions and galilean genesis in Horndeski's theory
Sakine Nishi, Tsutomu Kobayashi, Norihiro Tanahashi, Masahide Yamaguchi
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(
3
)
6 1 2014

Black hole perturbation in modified gravity
Teruaki Suyama, Tsutomu Kobayashi, Hayato Motohashi
JGRG 2014  Proceedings of the 24th Workshop on General Relativity and Gravitation in Japan3
401

419
2014

New Cosmological Solutions in Massive Gravity
Peerreviewed
Tsutomu Kobayashi, Masaru Siino, Masahide Yamaguchi, Daisuke Yoshida
NUCLEAR PHYSICS BPROCEEDINGS SUPPLEMENTS246
76

81
1 2014

Graceful exit from Higgs G inflation
Peerreviewed
Kohei Kamada, Tsutomu Kobayashi, Taro Kunimitsu, Masahide Yamaguchi, Jun'Ichi Yokoyama
Physical Review D  Particles, Fields, Gravitation and Cosmology88
(
12
)
13 12 2013

Multifield extension of G inflation
Peerreviewed
Tsutomu Kobayashi, Norihiro Tanahashi, Masahide Yamaguchi
Physical Review D  Particles, Fields, Gravitation and Cosmology88
(
8
)
8 10 2013

Graceful exit from Higgs Ginflation
Kohei Kamada, Tsutomu Kobayashi, Taro Kunimitsu, Masahide Yamaguchi, Jun'ichi Yokoyama
Phys. Rev. D 88, 123518 (2013)88
(
12
)
28 9 2013

Multifield Ginflation
Tsutomu Kobayashi, Norihiro Tanahashi, Masahide Yamaguchi
Phys. Rev. D 88, 083504 (2013)88
(
8
)
22 8 2013

Testing general scalartensor gravity and massive gravity with cluster lensing
Tatsuya Narikawa, Tsutomu Kobayashi, Daisuke Yamauchi, Ryo Saito
Phys.Rev.D87:124006,201387
(
12
)
10 2 2013

Nonlinear superhorizon curvature perturbation in generic singlefield inflation
Yuichi Takamizu, Tsutomu Kobayashi
Prog. Theor. Exp. Phys. 2013, 063E03
(
6
)
11 1 2013

On the graceful exit from Higgs Ginflation
Taro Kunimitsu, Kohei Kamada, Tsutomu Kobayashi, Masahide Yamaguchi, Junichi Yokoyama
JGRG 2013  Proceedings of the 23rd Workshop on General Relativity and Gravitation in Japan3
677

693
2013

Full bispectra from primordial scalar and tensor perturbations in the most general singlefield inflation model
Xian Gao, Tsutomu Kobayashi, Maresuke Shiraishi, Masahide Yamaguchi, Jun'ichi Yokoyama, Shuichiro Yokoyama
Progress of Theoretical and Experimental Physics
3 7 2012

New Cosmological Solutions in Massive Gravity
Tsutomu Kobayashi, Masaru Siino, Masahide Yamaguchi, Daisuke Yoshida
PHYSICAL REVIEW D86
(
6
)
23 5 2012

Generalized Higgs inflation
Kohei Kamada, Tsutomu Kobayashi, Tomo Takahashi, Masahide Yamaguchi, Jun'ichi Yokoyama
PHYSICAL REVIEW D86
(
2
)
19 3 2012

Black hole perturbation in the most general scalartensor theory with secondorder field equations I: The oddparity sector
Tsutomu Kobayashi, Hayato Motohashi, Teruaki Suyama
Phys.Rev. D85 (2012) 08402585
(
8
)
22 2 2012

Vainshtein screening in a cosmological background in the most general secondorder scalartensor theory
Rampei Kimura, Tsutomu Kobayashi, Kazuhiro Yamamoto
Phys.Rev.D85:024023,201285
(
2
)
29 11 2011

Observational Constraints on Kinetic Gravity Braiding from the Integrated SachsWolfe Effect
Rampei Kimura, Tsutomu Kobayashi, Kazuhiro Yamamoto
Phys.Rev.D85:123503,201285
(
12
)
17 10 2011

Effective gravitational couplings for cosmological perturbations in the most general scalartensor theories with secondorder field equations
Antonio De Felice, Tsutomu Kobayashi, Shinji Tsujikawa
Phys.Lett.B706:123133, 2011706
(
23
)
123

133
22 8 2011

Primordial nonGaussianities of gravitational waves in the most general singlefield inflation model
Xian Gao, Tsutomu Kobayashi, Masahide Yamaguchi, Jun'ichi Yokoyama
PHYSICAL REVIEW LETTERS107
(
21
)
18 8 2011

Generalized Ginflation: Inflation with the most general secondorder field equations
Tsutomu Kobayashi, Masahide Yamaguchi, Jun'ichi Yokoyama
Prog. Theor. Phys. 126 (2011), 511529
161

169
29 5 2011

Primordial nonGaussianity from G inflation
Peerreviewed
Tsutomu Kobayashi, Masahide Yamaguchi, Jun'Ichi Yokoyama
Physical Review D  Particles, Fields, Gravitation and Cosmology83
(
10
)
24 5 2011

Oscillating Bianchi IX Universe in HoravaLifshitz Gravity
Yosuke Misonoh, Keiichi Maeda, Tsutomu Kobayashi
Phys.Rev.D84:064030,201184
(
6
)
20 4 2011

Higgs G inflation
Peerreviewed
Kohei Kamada, Tsutomu Kobayashi, Masahide Yamaguchi, Jun'Ichi Yokoyama
Physical Review D  Particles, Fields, Gravitation and Cosmology83
(
8
)
18 4 2011

The Music of the Aetherwave  Bmode Polarization in EinsteinAether Theory
Masahiro Nakashima, Tsutomu Kobayashi
PHYSICAL REVIEW D84
(
8
)
11 3 2011

Primordial nonGaussianity from Ginflation
Tsutomu Kobayashi, Masahide Yamaguchi, Jun'ichi Yokoyama
Phys.Rev.D83:103524,201183
(
10
)
9 3 2011

CMB Polarization in EinsteinAether Theory
Masahiro Nakashima, Tsutomu Kobayashi
24 12 2010

Higgs Ginflation
Kohei Kamada, Tsutomu Kobayashi, Masahide Yamaguchi, Jun'ichi Yokoyama
Phys.Rev.D83:083515,201183
(
8
)
20 12 2010

Ginflation: inflation driven by the Galileon field
Tsutomu Kobayashi, Masahide Yamaguchi, Jun'ichi Yokoyama
Phys.Rev.Lett.105:231302,2010105
(
23
)
4 8 2010

Oscillating Universe in HoravaLifshitz Gravity
Keiichi Maeda, Yosuke Misonoh, Tsutomu Kobayashi
Phys.Rev.D82:064024,201082
(
6
)
15 6 2010

Cosmic expansion and growth histories in Galileon scalartensor models of dark energy
Tsutomu Kobayashi
Phys.Rev.D81:103533,201081
(
10
)
17 3 2010

Cosmological perturbations in a healthy extension of Horava gravity
Tsutomu Kobayashi, Yuko Urakawa, Masahide Yamaguchi
JCAP 1004:025,2010
(
4
)
17 2 2010

Evolution of linear cosmological perturbations and its observational implications in Galileontype modified gravity
Tsutomu Kobayashi, Hiroyuki Tashiro, Daichi Suzuki
Phys.Rev.D81:063513,201081
(
6
)
23 12 2009

Large scale evolution of the curvature perturbation in HoravaLifshitz cosmology
Tsutomu Kobayashi, Yuko Urakawa, Masahide Yamaguchi
JCAP 0911:015,2009
(
11
)
7 8 2009

Breaking the scale invariance of the primordial power spectrum in HoravaLifshitz Cosmology
Kazuhiro Yamamoto, Tsutomu Kobayashi, Gen Nakamura
Phys.Rev.D80:063514,200980
(
6
)
9 7 2009

A note on observational signatures in superluminal unified dark matter models
Yuko Urakawa, Tsutomu Kobayashi
JCAP 1007:027,2010
(
7
)
7 7 2009

Cluster formation and the SunyaevZel'dovich power spectrum in modified gravity: the case of a phenomenologically extended DGP model
Tsutomu Kobayashi, Hiroyuki Tashiro
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY398
(
1
)
477

484
23 3 2009

Gravitational waves from pform inflation
Tsutomu Kobayashi, Shuichiro Yokoyama
JCAP 0905:004,2009
(
5
)
16 3 2009

Can higher curvature corrections cure the singularity problem in f(R) gravity?
Peerreviewed
Tsutomu Kobayashi, KeiIchi Maeda
Physical Review D  Particles, Fields, Gravitation and Cosmology79
(
2
)
5 1 2009

Can higher curvature corrections cure the singularity problem in f(R) gravity?
Tsutomu Kobayashi, Keiichi Maeda
Phys.Rev.D79:024009,200979
(
2
)
31 10 2008

Relativistic stars in f(R) gravity, and absence thereof
Peerreviewed
Tsutomu Kobayashi, KeiIchi Maeda
Physical Review D  Particles, Fields, Gravitation and Cosmology78
(
6
)
8 9 2008

Quasinormal modes of black holes localized on the RandallSundrum 2brane
Peerreviewed
Masato Nozawa, Tsutomu Kobayashi
Physical Review D  Particles, Fields, Gravitation and Cosmology78
(
6
)
2 9 2008

Relativistic stars in f(R) gravity, and absence thereof
Tsutomu Kobayashi, Keiichi Maeda
Phys.Rev.D78:064019,200878
(
6
)
16 7 2008

UV caps, IR modification of gravity, and recovery of 4D gravity in regularized braneworlds
Tsutomu Kobayashi
Phys.Rev.D78:084018,200878
(
8
)
5 6 2008

Primordial magnetic fields from secondorder cosmological perturbations: Tight coupling approximation
Satoshi Maeda, Satoshi Kitagawa, Tsutomu Kobayashi, Tetsuya Shiromizu
Class.Quant.Grav.26:135014,200926
(
13
)
2 5 2008

Quasinormal modes of black holes localized on the RandallSundrum 2brane
Masato Nozawa, Tsutomu Kobayashi
Phys.Rev.D78:064006,200878
(
6
)
23 3 2008

Bulk scalar emission from a rotating black hole pierced by a tense brane
Peerreviewed
Tsutomu Kobayashi, Masato Nozawa, YuIchi Takamizu
Physical Review D  Particles, Fields, Gravitation and Cosmology77
(
4
)
14 2 2008

Curvature corrections to the low energy effective theory in 6D regularized braneworlds
Tsutomu Kobayashi, Tetsuya Shiromizu, Claudia de Rham
Phys.Rev.D77:124012,200877
(
12
)
1 2 2008

Bulk scalar emission from a rotating black hole pierced by a tense brane
Tsutomu Kobayashi, Masato Nozawa, Yuichi Takamizu
Phys.Rev.D77:044022,200877
(
4
)
9 11 2007

Low energy effective theory on a regularized brane in 6D gauged chiral supergravity
Frederico Arroja, Tsutomu Kobayashi, Kazuya Koyama, Tetsuya Shiromizu
JCAP 0712:006,2007
(
12
)
15 10 2007

Low energy effective theory on a regularized brane in sixdimensional flux compactifications
Shunsuke Fujii, Tsutomu Kobayashi, Tetsuya Shiromizu
Phys.Rev.D76:104052,200776
(
10
)
19 8 2007

Hybrid compactifications and brane gravity in six dimensions
Tsutomu Kobayashi, Yuichi Takamizu
Class.Quant.Grav.25:015007,200725
(
1
)
6 7 2007

Brane cosmological solutions in sixdimensional warped flux compactifications
Tsutomu Kobayashi, Masato Minamitsuji
JCAP 0707:016,2007
(
7
)
24 5 2007

Gravity on an extended brane in sixdimensional warped flux compactifications
Tsutomu Kobayashi, Masato Minamitsuji
Phys.Rev.D75:104013,200775
(
10
)
3 3 2007

Cosmological magnetic fields from nonlinear effects
Tsutomu Kobayashi, Roy Maartens, Tetsuya Shiromizu, Keitaro Takahashi
Phys.Rev.D75:103501,200775
(
10
)
21 1 2007

Scalar cosmological perturbations in the GaussBonnet braneworld
Tsutomu Kobayashi, Masato Minamitsuji
JCAP0612:008,2006
(
12
)
25 10 2006

Low energy effective gravitational equations on a GaussBonnet brane
Tsutomu Kobayashi, Tetsuya Shiromizu, Nathalie Deruelle
Phys.Rev.D74:104031,200674
(
10
)
24 8 2006

On asymptotic behavior of anisotropic DvaliGabadadzePorrati branes
Tsutomu Kobayashi
Class.Quant.Grav.23:48474851,200623
(
15
)
4847

4851
9 6 2006

Holographic entanglement entropy of de Sitter braneworld
Yukinori Iwashita, Tsutomu Kobayashi, Tetsuya Shiromizu, Hirotaka Yoshino
Phys.Rev. D74 (2006) 06402774
(
6
)
5 6 2006

Initial KaluzaKlein fluctuations and inflationary gravitational waves in braneworld cosmology
Tsutomu Kobayashi
Phys.Rev. D73 (2006) 12403173
(
12
)
17 2 2006

Spectrum of gravitational waves in RandallSundrum braneworld cosmology
Peerreviewed
Tsutomu Kobayashi, Takahiro Tanaka
Physical Review D  Particles, Fields, Gravitation and Cosmology73
(
4
)
2006

The spectrum of gravitational waves in RandallSundrum braneworld cosmology
Tsutomu Kobayashi, Takahiro Tanaka
Phys.Rev. D73 (2006) 04400573
(
4
)
18 11 2005

Quantummechanical generation of gravitational waves in a braneworld
Peerreviewed
Tsutomu Kobayashi, Takahiro Tanaka
Physical Review D  Particles, Fields, Gravitation and Cosmology71
(
12
)
15 6 2005

Quantummechanical generation of gravitational waves in braneworld
Tsutomu Kobayashi, Takahiro Tanaka
Phys.Rev. D71 (2005) 12402871
(
12
)
7 5 2005

A Vaidyatype radiating solution in EinsteinGaussBonnet gravity and its application to braneworld
Tsutomu Kobayashi
Gen.Rel.Grav. 37 (2005) 1869187637
(
11
)
1869

1876
7 4 2005

Leading order corrections to the cosmological evolution of tensor perturbations in braneworld (Short version)
Tsutomu Kobayashi, Takahiro Tanaka
1 3 2005

Fivedimensional black strings in EinsteinGaussBonnet gravity
Tsutomu Kobayashi, Takahiro Tanaka
Phys.Rev. D71 (2005) 084005
31 12 2004

Leading order corrections to the cosmological evolution of tensor perturbations in braneworld
Tsutomu Kobayashi, Takahiro Tanaka
JCAP 0410 (2004) 015
(
10
)
9 8 2004

Bulk inflaton shadows of vacuum gravity
Tsutomu Kobayashi, Takahiro Tanaka
Phys.Rev. D69 (2004) 06403769
(
6
)
21 11 2003

Primordial gravitational waves in inflationary braneworld
Tsutomu Kobayashi, Hideaki Kudoh, Takahiro Tanaka
Phys.Rev. D68 (2003) 04402568
(
4
)
2 5 2003

Primordial gravitational waves in an inflationary braneworld
Peerreviewed
Tsutomu Kobayashi, Hideaki Kudoh, Takahiro Tanaka
Physical Review D68
(
4
)
2003