35 citations · 112 across the 5 of their papers we have counts for
4 papers · 1 filter
Effective treatment of U(1) gauge field and charged particles in axion inflation
Tomohiro Fujita, Jun'ya Kume, Kyohei Mukaida +1
The axionic inflaton with the Chern-Simons coupling may generate U(1) gauge fields and charged particles simultaneously. In order to incorporate the backreaction from the charged p…
Chiral gravitational effect in time-dependent backgrounds
Kohei Kamada, Jun'ya Kume, Yusuke Yamada
Gravitational counterpart of the chiral magnetic effect, which is referred as the chiral gravitational effect, can also be of interest in a cosmological setup. In this study, we in…
Renormalization in gravitational leptogenesis with pseudo-scalar-tensor coupling
Kohei Kamada, Jun'ya Kume, Yusuke Yamada
We consider the renormalization in the pseudo-scalar inflation models with the gravitational Chern-Simons term. In this model, lepton asymmetry is generated from the chiral gravita…
Gravitational leptogenesis with kination and gravitational reheating
Kohei Kamada, Jun'ya Kume, Yusuke Yamada +1
We revisit the gravitational leptogenesis scenario in which the inflaton is coupled to gravity by the Chern-Simons term and the lepton asymmetry is generated through the gravitatio…