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- W4285046286 abstract "Abstract It is typically assumed that during reheating the inflaton decays with a constant decay width. However, this is not guaranteed and can have a strong impact on the dark matter (DM) genesis. In the context of the ultraviolet (UV) freeze-in mechanism, if the operators connecting the dark and visible sectors are of sufficiently high mass dimension, the bulk of the DM abundance is produced during and not after reheating. We study here the impact of a time-dependent decay width of the inflaton on the DM abundance, emphasizing the differences with respect to the cases where the decay is either instantaneous or constant. We also provide concrete examples for DM production via UV freeze-in, e.g., from 2-to-2 scatterings of standard model particles, or from inflaton scatterings or decays, elucidating how the time-dependence influences the DM yield." @default.
- W4285046286 created "2022-07-13" @default.
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- W4285046286 date "2022-07-01" @default.
- W4285046286 modified "2023-10-06" @default.
- W4285046286 title "Ultraviolet freeze-in with a time-dependent inflaton decay" @default.
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- W4285046286 doi "https://doi.org/10.1088/1475-7516/2022/07/019" @default.
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