Ando, M., Kawamura, Seiji, Nakamura, T., Tsubono, K., Tanaka, T., Funaki, I., ...
DECIGO pathfinder (DPF) is a milestone satellite mission for DECIGO (DECi-hertz Interferometer Gravitational wave Observatory) which is a future space gravitational wave antenna. DECIGO is expected...
The Japanese space gravitational wave antenna: DECIGO (2008)
Kawamura, Seiji, Ando, M., Nakamura, T., Tsubono, K., Tanaka, T., Funaki, I., ...
DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) is the future Japanese space gravitational wave antenna. DECIGO is expected to open a new window of observation for gravitational...
The Japanese space gravitational wave antenna - DECIGO (2008)
Kawamura, Seiji, Ando, M., Nakamura, T., Tsubono, K., Tanaka, T., Funaki, I., ...
DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) is the future Japanese space gravitational wave antenna. The goal of DECIGO is to detect gravitational waves from various kinds of...
The Japanese space gravitational wave antenna - DECIGO (2006)
Kawamura, Seiji, Nakamura, T., Ando, M., Seto, N., Tsubono, K., Numata, K., ...
DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) is the future Japanese space gravitational wave antenna. It aims at detecting various kinds of gravitational waves between 1 mHz and...
Stabilizing dilaton and baryogenesis (2002)
Dolgov, Alexander D., Kohri, K., Seto, Osamu, Yokoyama, Jun'ichi
Entropy production by the dilaton decay is studied in the model where the dilaton acquires potential via gaugino condensation in the hidden gauge group. Its effect on the Affleck-Dine baryogenesis is...
Gamma-Ray Burst Neutrino Background and Star Formation History in the Universe (2002)
Nagataki, S., Kohri, K., Ando, S., Sato, K.
We estimate the flux of the GRB neutrino background and compute the event rate at SK and TITAND in the collapsar model, assuming that GRB formation rate is proportional to the star formation rate. We...
Oscillating scalar-field dark matter in supergravity (2001)
Seto, Osamu, Kohri, K., Nakamura, Takashi
We show that an oscillating scalar field in supergravity of mass of the order of $\sim$ TeV with a nonzero vacuum expectation value ($\sim 10^{10}$ GeV) can be a candidate of cold dark matter (CDM)....
Kohri, K., Yamada, Shoichi, Nagataki, S.
We study the equation of state of electron in strong magnetic fields which are greater than the critical value $B_c \simeq 4.4 \times 10^{13}$ Gauss. We find that such a strong magnetic field induces...
In this paper we consider the effects on big bang nucleosynthesis (BBN) of the hadronic decay of a long-lived massive particle. If high-energy hadrons are emitted near the BBN epoch ($t \sim 10^{-2}$...
Polarization tensors in a strong magnetic field (2001)
The vacuum polarization tensor in strong external magnetic fields has been evaluated numerically for various strengths of magnetic fields and momenta of photons under the threshold of the $e^{\pm}$...
Rapid-Process Nucleosynthesis in Neutrino-Magneto-Centrifugally Driven Winds (2001)
We have studied whether the rotation and magnetic fields in neutrino-driven winds can be key processes for the rapid-process (r-process) nucleosynthesis. We have examined the features of a steady and...
Kawasaki, M., Kohri, K., Moroi, Takeo
We consider the effects on big bang nucleosynthesis (BBN) of the radiative decay of a long-lived massive particle. If high-energy photons are emitted after the BBN epoch ($t \sim 1 - 10^3$ sec), they...
Neutralino Warm Dark Matter (2000)
Hisano, J, Kohri, K, Nojiri, M M
In the supersymmetric (SUSY) standard model, the lightest neutralino may be the lightest SUSY particle (LSP), and it is is a candidate of the dark matter in the universe. The LSP dark matter might be...
Neutralino Warm Dark Matter (2000)
Hisano, J., Kohri, K., Nojiri, M. M.
In the supersymmetric (SUSY) standard model, the lightest neutralino may be the lightest SUSY particle (LSP), and it is is a candidate of the dark matter in the universe. The LSP dark matter might be...
Features of Nucleosynthesis and Neutrino Emission from Collapsars (2000)
In this study we present two indicators that will reflect the difference between collapsars and normal collapse-driven supernovae. They are products of explosive nucleosynthesis and neutrino...
MeV-scale Reheating Temperature and Thermalization of Neutrino Background (2000)
Kawasaki, M., Kohri, K., Sugiyama, Naoshi
The late-time entropy production by the massive particle decay induces the various cosmological effects in the early epoch and modify the standard scenario. We investigate the thermalization process...
Pulsar Kick and Asymmetric Iron Velocity Distribution in SN 1987A (1999)
We have investigated the relation of the direction of the momentum among the matter, neutrino, and proto-neutron star in a collapse-driven supernova in order to discuss the pulsar kick. In...
We investigate the influence of hadron injection from evaporating primordial black holes (PBHs) in the early stage of the primordial nucleosynthesis era (t = 10^{-3} - 10^4 sec). The emitted...
Cosmological Constraints on Late-time Entropy Production (1998)
Kawasaki, M., Kohri, K., Sugiyama, Naoshi
We investigate cosmological effects concerning the late-time entropy production due to the decay of non-relativistic massive particles. The thermalization process of neutrinos after the entropy...
Radiative Decay of a Long-Lived Particle and Big-Bang Nucleosynthesis (1998)
Holtmann, Erich, Kawasaki, M., Kohri, K., Moroi, Takeo
The effects of radiatively decaying, long-lived particles on big-bang nucleosynthesis (BBN) are discussed. If high-energy photons are emitted after BBN, they may change the abundances of the light...
Massive Decaying Tau Neutrino and Big Bang Nucleosynthesis (1997)
Kawasaki, M., Kohri, K., Sato, Katsuhiko
Comparing Big Bang Nucleosynthesis predictions with the light element abundances inferred from observational data, we can obtain the strong constraints on some neutrino properties, e.g. number of...
Big Bang Nucleosynthesis and Lepton Number Asymmetry in the Universe (1996)
Kohri, K., Kawasaki, M., Sato, Katsuhiko
Recently it is reported that there is the discrepancy between big bang nucleosynthesis theory and observations (BBN crisis). We show that BBN predictions agree with the primordial abundances of light...
Hirota, S., Imakita, M., Kohri, K., Ito, A., Morii, E., Adachi, S., ...
Calcification is a common complication in atherosclerosis. As osteopontin (OPN) and osteonectin (ON) are not only involved in the physiological but also the pathological calcification of tissues, we...