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Constraints on the Primordial Magnetic Field from
Dai G. Yamazaki, Kiyotomo Ichiki, Toshitaka Kajino +1
A primordial magnetic field (PMF) can affect the evolution of density field fluctuations in the early universe.In this paper we constrain the PMF amplitude and power spectral…
Neutrino-Nucleus Reaction Cross Sections for Light Element Synthesis in Supernova Explosions
T. Yoshida, T. Suzuki, S. Chiba +5
The neutrino-nucleus reaction cross sections of 4He and 12C are evaluated using new shell model Hamiltonians. Branching ratios of various decay channels are calculated to evaluate…
Effects of Beta-Decays of Excited-State Nuclei on the Astrophysical r-Process
M. A. Famiano, R. N. Boyd, T. Kajino +3
A rudimentary calculation is employed to evaluate the possible effects of beta- decays of excited-state nuclei on the astrophysical r-process. Single-particle levels calculated wit…
Neutrino mass effects on vector and tensor CMB anisotropies in the presence of a primordial magnetic field
Kazuhiko Kojima, Kiyotomo Ichiki, Dai G. Yamazaki +2
If a primordial magnetic field (PMF) is present during photon decoupling and afterward, a finite neutrino mass can affect all modes of the CMB. In this work, we expand on earlier s…
New Constraints on Radiative Decay of Long-Lived Particles in Big Bang Nucleosynthesis with New He Photodisintegration Data
Motohiko Kusakabe, Toshitaka Kajino, Takashi Yoshida +3
A recent measurement of He photodisintegration reactions, He(,)H and He(,)He with laser-Compton photons shows smaller cross sections than those esti…
Effects of a Primordial Magnetic Field on Low and High Multipoles of the CMB
Dai G. Yamazaki, Kiyotomo Ichiki, Toshitaka Kajino +1
The existence of a primordial magnetic field (PMF) would affect both the temperature and polarization anisotropies of the cosmic microwave background (CMB). It also provides a plau…