Inflaton freeze-out
arXiv:2110.05488 · doi:10.1103/PhysRevD.106.043537
Abstract
We study the possibility that, after inflation, the inflaton reaches thermal equilibrium with the Standard Model thermal bath and eventually freezes-out in the non-relativistic regime. When the inflaton decay is the sole source of (non-thermal) dark matter, its relic density is automatically suppressed. We delineate parameter space leading to the correct dark matter abundance. The model allows for a significant Higgs-inflaton coupling which may lead to invisible Higgs decay into inflaton pairs at the LHC.
arXiv comment14 pages, 3 figures; v2: matches version published in PRD (extended discussions, fixed typos, updated references)
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