Thermal corrections to a mediator mass can open kinematically forbidden decays and produce dark matter, with a relic abundance nearly independent of the dark matter mass for renormalizable couplings.
Thermal production of axino Dark Matter
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abstract
We reconsider thermal production of axinos in the early universe, adding: a) missed terms in the axino interaction; b) production via gluon decays kinematically allowed by thermal masses; c) a precise modeling of reheating. We find an axino abunance a few times larger than previous computations.
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2019 1verdicts
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Forbidden frozen-in dark matter
Thermal corrections to a mediator mass can open kinematically forbidden decays and produce dark matter, with a relic abundance nearly independent of the dark matter mass for renormalizable couplings.