Physical review letters
Ultrarelativistic Freeze-Out: A Bridge from WIMPs to FIMPs.
Stephen E Henrich, Yann Mambrini, Keith A Olive
Published: 202510.1103/zk9k-nbpj
Abstract
We reexamine the case for dark matter (DM) produced by ultrarelativistic freeze-out (UFO). UFO is the mechanism by which standard model neutrinos decouple from the radiation bath in the early Universe at a temperature T_{d}≈1 MeV. This corresponds t…
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