242 citations · 3.5k across the 87 of their papers we have counts for
5 papers · 1 filter
Thermalization after/during Reheating
Keisuke Harigaya, Kyohei Mukaida
If reheating of the Universe takes place via Planck-suppressed decay, it seems that the thermalization of produced particles might be delayed, since they have large energy/small nu…
The universe dominated by oscillating scalar with non-minimal derivative coupling to gravity
Ryusuke Jinno, Kyohei Mukaida, Kazunori Nakayama
We study the expansion law of the universe dominated by the oscillating scalar field with non-minimal derivative coupling to gravity as G^{μν} \partial_μ ϕ\partial_ν ϕ. In this sys…
Fate of Symmetric Scalar Field
Kyohei Mukaida, Kazunori Nakayama, Masahiro Takimoto
The evolution of a coherently oscillating scalar field with symmetry is studied in detail. We calculate the dissipation rate of the scalar field based on the closed time path…
Scalar Trapping and Saxion Cosmology
Takeo Moroi, Kyohei Mukaida, Kazunori Nakayama +1
We study in detail the dynamics of a scalar field in thermal bath with symmetry breaking potential. In particular, we focus on the process of trapping of a scalar field at an enhan…
Axino dark matter with R-parity violation and 130 GeV gamma-ray line
Motoi Endo, Koichi Hamaguchi, Seng Pei Liew +2
We show that decaying axino dark matter with R-parity violation can explain the observed excess of the 130GeV gamma-ray line from the Galactic center in the Fermi data. The branchi…