Dark matter produced from right-handed neutrinos
Abstract Right-handed neutrinos (RHNs) provide a natural portal to a dark sector accommodating dark matter (DM). In this work, we consider that the dark sector is connected to the standard model only via RHNs and ask how DM can be produced from RHNs. Our framework concentrates on a rather simple and...
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Published in | Journal of cosmology and astroparticle physics Vol. 2023; no. 6; pp. 47 - 77 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Bristol
IOP Publishing
01.06.2023
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Subjects | |
Online Access | Get full text |
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Summary: | Abstract
Right-handed neutrinos (RHNs) provide a natural portal
to a dark sector accommodating dark matter (DM). In this work, we
consider that the dark sector is connected to the standard model
only via RHNs and ask how DM can be produced from RHNs. Our framework
concentrates on a rather simple and generic interaction that couples
RHNs to a pair of dark particles. Depending on whether RHNs are light
or heavy in comparison to the dark sector and also on whether one
or both of them are in the freeze-in/out regime, there are many distinct
scenarios resulting in rather different results. We conduct a comprehensive
and systematic study of all possible scenarios in this paper. For
illustration, we apply our generic results to the type-I seesaw model
with the dark sector extension, addressing whether and when DM in
this model can be in the freeze-in or freeze-out regime. Some observational
consequences in this framework are also discussed. |
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ISSN: | 1475-7516 1475-7516 |
DOI: | 10.1088/1475-7516/2023/06/047 |