Cosmology of Sub-MeV Dark Matter Freeze-In

Volume: 127, Issue: 11
Published: Sep 9, 2021
Abstract
Dark matter (DM) could be a relic of freeze-in through a light mediator, where the DM is produced by extremely feeble, IR-dominated processes in the thermal standard model plasma. In the simplest viable models with DM lighter than 1 MeV, the DM has a small effective electric charge and is born with a nonthermal phase-space distribution. This DM candidate would cause observable departures from standard cosmological evolution. In this work, we...
Paper Details
Title
Cosmology of Sub-MeV Dark Matter Freeze-In
Published Date
Sep 9, 2021
Volume
127
Issue
11
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