Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 10, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2020/10/021
Keywords
dark matter theory; inflation; particle physics - cosmology connection; physics of the early universe
Funding
- Estonian Research Council [PRG803, MOBTTP135, MOBTT5]
- EU through the European Regional Development Fund [CoE program TK133]
- European Union [674896, 690575]
- Universidad Antonio Narino [2018204, 2019101, 2019248]
- Spanish MINECO [FPA2017-84543-P]
- Fundacao para a Ciencia e a Tecnologia (Portugal) through the CEEC-IND programme [CEECIND/01091/2018]
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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.
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