UV freeze-in in Starobinsky inflation

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http://hdl.handle.net/10138/335061

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Bernal , N , Rubio , J & Veermäe , H 2020 , ' UV freeze-in in Starobinsky inflation ' , Journal of Cosmology and Astroparticle Physics , no. 10 , 021 . https://doi.org/10.1088/1475-7516/2020/10/021

Title: UV freeze-in in Starobinsky inflation
Author: Bernal, Nicolas; Rubio, Javier; Veermäe, Hardi
Contributor: University of Helsinki, Helsinki Institute of Physics
Date: 2020-10
Language: eng
Number of pages: 22
Belongs to series: Journal of Cosmology and Astroparticle Physics
ISSN: 1475-7516
URI: http://hdl.handle.net/10138/335061
Abstract: In the Starobinsky model of inflation, the observed dark matter abundance can be produced from the direct decay of the inflaton field only in a very narrow spectrum of closeto-conformal scalar fields and spinors of mass similar to 10(7) GeV. This spectrum can be, however, significantly broadened in the presence of effective non-renormalizable interactions between the dark and the visible sectors. In particular, we show that UV freeze-in can efficiently generate the right dark matter abundance for a large range of masses spanning from the keV to the PeV scale and arbitrary spin, without significantly altering the heating dynamics. We also consider the contribution of effective interactions to the inflaton decay into dark matter.
Subject: dark matter theory
inflation
particle physics - cosmology connection
physics of the early universe
SCALAR-FIELD
DARK-MATTER
GRAVITY
115 Astronomy, Space science
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