Seminarium "Teoria cząstek elementarnych i kosmologia"

The Higgs potential can be destabilized during (high scale) inflation by fluctuations in the de Sitter space. We propose a simple model where the inflaton, non-minimally coupled to gravity, is coupled to the Higgs field, changing the quartic coupling beta function such that the Higgs potential is stabilized. This leads to a modified Higgs Inflation scenario where the Higgs participates in the inflationary process. If the inflaton is coupled to the Chern-Simons density of the hypercharge, it can generate baryon asymmetry at the electroweak phase transition. Naturalness arguments require the inflaton to be at the TeV scale. If the inflaton has a TeV mass, it can be produced at the LHC, mainly by gluon-gluon fusion.