Freeze-in Dark Matter Perturbations are Adiabatic

Published 16 Nov 2022 in hep-ph and gr-qc | (2211.08719v1)

Abstract: We show that the large-scale perturbations in the dark matter generated by the freeze-in mechanism are only of adiabatic nature. The freeze-in mechanism is not at odds with the current stringent constraints on isocurvature perturbations.

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