2017-10-02

UTAPwiki/セミナー/初期宇宙・相対論速報
Speaker: Jun'ichi Yokoyama (RESCEU)
Title: Spontaneous genesis after G-inflation
Abstract:
In kinetically driven G-inflation, the Universe after inflation
is dominated by the kinetic energy density of a free scalar field
whose energy density is dissipated in proportion to $a^{-6}$
so that the cosmic expansion law is like $a(t) \propto t^{1/3}$.
The reheating is achieved by gravitational particle production
or through direct coupling preserving the shift symmetry of the
model. We discuss spontaneous baryogenesis and asymmetric
dark matter genesis may be possible if these charge densities
have a derivative coupling with the inflaton.