Publications (167)
Constraining Neutrino Masses by CMB Experiments Alone
Kazuhide Ichikawa, Masataka Fukugita, Masahiro Kawasaki
Hadronic decay of the gravitino in the early universe and its implications to inflation
Masahiro Kawasaki, Kazunori Kohri, Takeo Moroi
Gravitino Overproduction in Inflaton Decay
Masahiro Kawasaki, Fuminobu Takahashi, T. T. Yanagida
Revisiting Big-Bang Nucleosynthesis Constraints on Dark-Matter Annihilation
Masahiro Kawasaki, Kazunori Kohri, Takeo Moroi +1
I-ball formation with logarithmic potential
Masahiro Kawasaki, Naoyuki Takeda
Collapse of Axionic Domain Wall and Axion Emission
Michiyasu Nagasawa, Masahiro Kawasaki
Axion isocurvature fluctuations with extremely blue spectrum
Shinta Kasuya, Masahiro Kawasaki
Dynamics of Peccei-Quinn Breaking Field after Inflation and Axion Isocurvature Perturbations
Keisuke Harigaya, Masahiro Ibe, Masahiro Kawasaki +1
Non-Gaussianity from Baryon Asymmetry
Masahiro Kawasaki, Kazunori Nakayama, Fuminobu Takahashi
Compensation for large tensor modes with iso-curvature perturbations in CMB anisotropies
Masahiro Kawasaki, Shuichiro Yokoyama
Affleck-Dine baryogenesis in anomaly-mediated SUSY breaking
Masahiro Kawasaki, Kazunori Nakayama
Destruction of 7Be in big bang nucleosynthesis via long-lived sub-strongly interacting massive particles as a solution to the Li problem
Masahiro Kawasaki, Motohiko Kusakabe
Hubble Induced Mass in Radiation Dominated Universe
Masahiro Kawasaki, Tomohiro Takesako
Numerical study of Q-ball formation in gravity mediation
Takashi Hiramatsu, Masahiro Kawasaki, Fuminobu Takahashi
Inflationary Primordial Black Holes as All Dark Matter
Keisuke Inomata, Masahiro Kawasaki, Kyohei Mukaida +2
Non-Gaussianity from Curvatons Revisited
Masahiro Kawasaki, Takeshi Kobayashi, Fuminobu Takahashi
Increasing the effective number of neutrinos with decaying particles
Kazuhide Ichikawa, Masahiro Kawasaki, Kazunori Nakayama +2
Solving the discrepancy among the light elements abundances and WMAP
Kazuhide Ichikawa, Masahiro Kawasaki, Fuminobu Takahashi
Moduli problem and Q-ball baryogenesis in gauge-mediated SUSY breaking models
Masahiro Kawasaki
Heavy gravitino in hybrid inflation
Masahiro Kawasaki, Naoya Kitajima, Kazunori Nakayama +1
Signals of the cosmological reionization in the radio sky through C and O fine structure lines
Motohiko Kusakabe, Masahiro Kawasaki
Affleck-Dine baryogenesis after D-term inflation and solutions to the baryon-DM coincidence problem
Masahiro Kawasaki, Masaki Yamada
Cosmological implications of supersymmetric axion models
Masahiro Kawasaki, Kazunori Nakayama, Masato Senami
Cosmological Constraints on Neutrino Injection
Toru Kanzaki, Masahiro Kawasaki, Kazunori Kohri +1
Chemical separation of primordial Li$^+$ during structure formation caused by nanogauss magnetic field
Motohiko Kusakabe, Masahiro Kawasaki
Extended analysis of CMB constraints on non-Gaussianity in isocurvature perturbations
Chiaki Hikage, Masahiro Kawasaki, Toyokazu Sekiguchi +1
A solution to the baryon-DM coincidence problem in the CMSSM with a 126-GeV Higgs boson
Ayuki Kamada, Masahiro Kawasaki, Masaki Yamada
Charged Q-balls in gauge mediated SUSY breaking models
Jeong-Pyong Hong, Masahiro Kawasaki, Masaki Yamada
Observable dark radiation from cosmologically safe QCD axion
Masahiro Kawasaki, Masaki Yamada, Tsutomu T. Yanagida
Inflationary primordial black holes for the LIGO gravitational wave events and pulsar timing array experiments
Keisuke Inomata, Masahiro Kawasaki, Kyohei Mukaida +2
Q ball Decay Rates into Gravitinos and Quarks
Masahiro Kawasaki, Masaki Yamada
Evolution of String-Wall Networks and Axionic Domain Wall Problem
Takashi Hiramatsu, Masahiro Kawasaki, Ken'ichi Saikawa
Constraint on the Effective Number of Neutrino Species from the WMAP and SDSS LRG Power Spectra
Kazuhide Ichikawa, Masahiro Kawasaki, Fuminobu Takahashi
The two-field regime of natural inflation
Ana Achúcarro, Vicente Atal, Masahiro Kawasaki +1
Smooth hybrid inflation in a supersymmetric axion model
Masahiro Kawasaki, Naoya Kitajima, Kazunori Nakayama
Affleck-Dine Baryogenesis and Dark Matter Production after High-scale Inflation
Keisuke Harigaya, Ayuki Kamada, Masahiro Kawasaki +2
Double Inflation in Supergravity and the Boomerang Observations
Toshiyuki Kanazawa, Masahiro Kawasaki, Naoshi Sugiyama +1
Domain wall and isocurvature perturbation problems in axion models
Masahiro Kawasaki, Tsutomu T. Yanagida, Kazuyoshi Yoshino
B-mode polarization induced by gravitational waves from kinks on infinite cosmic strings
Masahiro Kawasaki, Koichi Miyamoto, Kazunori Nakayama
Cosmic Rays from Dark Matter Annihilation and Big-Bang Nucleosynthesis
Junji Hisano, Masahiro Kawasaki, Kazunori Kohri +2
Big-Bang Nucleosynthesis and Hadronic Decay of Long-Lived Massive Particles
Masahiro Kawasaki, Kazunori Kohri, Takeo Moroi
Right-handed sneutrino dark matter and big-bang nucleosynthesis
Koji Ishiwata, Masahiro Kawasaki, Kazunori Kohri +1
CDM/baryon isocurvature perturbations in a sneutrino curvaton model
Keisuke Harigaya, Taku Hayakawa, Masahiro Kawasaki +1
Gravitational waves from a curvaton model with blue spectrum
Masahiro Kawasaki, Naoya Kitajima, Shuichiro Yokoyama
The Gravitino-Overproduction Problem in Inflaton Decay
Masahiro Kawasaki, Fuminobu Takahashi, T. T. Yanagida
Primordial seeds of supermassive black holes
Masahiro Kawasaki, Alexander Kusenko, Tsutomu T. Yanagida
Axino dark matter and baryon number asymmetry production by the Q-ball decay in gauge mediation
Shinta Kasuya, Etsuko Kawakami, Masahiro Kawasaki
Cosmological Constraints on Gravitino LSP Scenario with Sneutrino NLSP
Toru Kanzaki, Masahiro Kawasaki, Kazunori Kohri +1
CMB constraints on the fine structure constant
Kazuhide Ichikawa, Toru Kanzaki, Masahiro Kawasaki
Neutrino Signals from Annihilating/Decaying Dark Matter in the Light of Recent Measurements of Cosmic Ray Electron/Positron Fluxes
Junji Hisano, Masahiro Kawasaki, Kazunori Kohri +1
Big bang nucleosynthesis with a varying fine structure constant and non-standard expansion rate
Kazuhide Ichikawa, Masahiro Kawasaki
Constraining light gravitino mass with 21 cm line observation
Yoshihiko Oyama, Masahiro Kawasaki
Gravitational waves from smooth hybrid new infation
Masahiro Kawasaki, Ken'ichi Saikawa, Naoyuki Takeda
CMB constraint on non-Gaussianity in isocurvature perturbations
Chiaki Hikage, Masahiro Kawasaki, Toyokazu Sekiguchi +1
511 keV line and diffuse gamma rays from moduli
Shinta Kasuya, Masahiro Kawasaki
Axion braneworld cosmology
Cosimo Bambi, Masahiro Kawasaki, Federico R. Urban
Power Spectrum of the Density Perturbations From Smooth Hybrid New Inflation Model
Masahiro Kawasaki, Tsutomu Takayama, Masahide Yamaguchi +1
Revisiting the gravitino dark matter and baryon asymmetry from Q-ball decay in gauge mediation
Shinta Kasuya, Masahiro Kawasaki, Masaki Yamada
Baryon Asymmetry in a Heavy Moduli Scenario
Masahiro Kawasaki, Kazunori Nakayama
Solving the cosmic lithium problems with primordial late-decaying particles
Daniel Cumberbatch, Kazuhide Ichikawa, Masahiro Kawasaki +3
Electron and Photon Energy Deposition in Universe
Toru Kanzaki, Masahiro Kawasaki
The oscillation effects on thermalization of the neutrinos in the universe with low reheating temperature
Kazuhide Ichikawa, Masahiro Kawasaki, Fuminobu Takahashi
Cosmological Constraints on Isocurvature and Tensor Perturbations
Masahiro Kawasaki, Toyokazu Sekiguchi
Decay rates of Gaussian-type I-balls and Bose-enhancement effects in 3+1 dimensions
Masahiro Kawasaki, Masaki Yamada
Probing the primordial power spectra with inflationary priors
Masahiro Kawasaki, Toyokazu Sekiguchi
Inflation from a Supersymmetric Axion Model
Masahiro Kawasaki, Naoya Kitajima, Kazunori Nakayama
Adiabatic and isocurvature fluctuations of Affleck-Dine field in D-term inflation model
Masahiro Kawasaki, Fuminobu Takahashi
Charged Q-ball Dark Matter from $B$ and $L$ direction
Jeong-Pyong Hong, Masahiro Kawasaki, Masaki Yamada
Q-ball Instability due to U(1) Breaking
Masahiro Kawasaki, Kenichiro Konya, Fuminobu Takahashi
Q-ball dark matter and baryogenesis in high-scale inflation
Shinta Kasuya, Masahiro Kawasaki
Primordial Helium Abundance: A Reanalysis of the Izotov-Thuan Spectroscopic Sample
Masataka Fukugita, Masahiro Kawasaki
Cosmological Constraints on a Massive Neutrino
Masahiro Kawasaki, Katsuhiko Sato
Primordial Black Holes as All Dark Matter
Paul H. Frampton, Masahiro Kawasaki, Fuminobu Takahashi +1
Late-time Affleck-Dine baryogenesis after thermal inflation
Masahiro Kawasaki, Kazunori Nakayama
Production of 9Be through alpha-fusion reaction of metal-poor cosmic ray and stellar flare
Motohiko Kusakabe, Masahiro Kawasaki
A General Analysis of Non-Gaussianity from Isocurvature Perturbations
Masahiro Kawasaki, Kazunori Nakayama, Toyokazu Sekiguchi +2
Isocurvature fluctuations in Affleck-Dine mechanism and constraints on inflation models
Shinta Kasuya, Masahiro Kawasaki, Fuminobu Takahashi
CMB Constraint on Dark Matter Annihilation after Planck 2015
Masahiro Kawasaki, Kazunori Nakayama, Toyokazu Sekiguchi
Non-Gaussian isocurvature perturbations in dark radiation
Etsuko Kawakami, Masahiro Kawasaki, Koichi Miyamoto +2
Dark Matter Production in Late Time Reheating
Keisuke Harigaya, Masahiro Kawasaki, Kyohei Mukaida +1
Solving Cosmological Problems of Supersymmetric Axion Models in an Inflationary Universe
Masahiro Kawasaki, Kazunori Nakayama
Early reionization by decaying particles in the light of three year WMAP data
Shinta Kasuya, Masahiro Kawasaki
Updated constraint on a primordial magnetic field during big bang nucleosynthesis and a formulation of field effects
Masahiro Kawasaki, Motohiko Kusakabe
PBH Dark Matter in Supergravity Inflation Models
Masahiro Kawasaki, Alexander Kusenko, Yuichiro Tada +1
Remarks on Hubble Induced Mass from Fermion Kinetic Term
Masahiro Kawasaki, Tomohiro Takesako
A new algorithm for calculating the curvature perturbations in stochastic inflation
Tomohiro Fujita, Masahiro Kawasaki, Yuichiro Tada +1
Non-Gaussianity from Isocurvature Perturbations : Analysis of Trispectrum
Etsuko Kawakami, Masahiro Kawasaki, Kazunori Nakayama +1
Improved estimation of radiated axions from cosmological axionic strings
Takashi Hiramatsu, Masahiro Kawasaki, Toyokazu Sekiguchi +2
Formation of intermediate-mass black holes as primordial black holes in the inflationary cosmology with running spectral index
Toshihiro Kawaguchi, Masahiro Kawasaki, Tsutomu Takayama +2
Kahler moduli double inflation
Masahiro Kawasaki, Koichi Miyamoto
Oscillating Affleck-Dine condensate and its cosmological implications
Fuminori Hasegawa, Masahiro Kawasaki
High-scale SUSY from an R-invariant New Inflation in the Landscape
Masahiro Kawasaki, Masaki Yamada, Tsutomu T. Yanagida +1
Large Scale Cosmic Perturbation from Evaporation of Primordial Black Holes
Tomohiro Fujita, Keisuke Harigaya, Masahiro Kawasaki
Condition for Primordial Black Hole Formation in Randall-Sundrum Cosmology
Masahiro Kawasaki
Non-Gaussianity from isocurvature perturbations
Masahiro Kawasaki, Kazunori Nakayama, Toyokazu Sekiguchi +2
Inflaton Decay through Supergravity Effects
Motoi Endo, Masahiro Kawasaki, Fuminobu Takahashi +1
Big-Bang Nucleosynthesis with Long-Lived Charged Slepton
Masahiro Kawasaki, Kazunori Kohri, Takeo Moroi
Revisiting the cosmological coherent oscillation
Masahiro Kawasaki, Naoya Kitajima, Kazunori Nakayama
Cosmological Problems of the String Axion Alleviated by High Scale SUSY of $m_{3/2}$ $\simeq$ 10-100 TeV
Masahiro Kawasaki, Tsutomu T. Yanagida, Norimi Yokozaki
Suppressing the QCD Axion Abundance by Hidden Monopoles
Masahiro Kawasaki, Fuminobu Takahashi, Masaki Yamada