Dark Matter from freeze-in and its inhomogeneities
arXiv:2211.08359 · doi:10.1007/JHEP03(2023)042
Abstract
We consider generic freeze-in processes for generation of Dark Matter, together with the consequent re-thermalization of the Standard Model fluid. We find that Dark Matter inherits the Standard Model adiabatic inhomogeneities on the cosmological scales probed by current observations, that were super-horizon during freeze-in. Thereby, freeze-in satisfies the bounds on iso-curvature perturbations.
arXiv comment8 pages. Published on JHEP
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