Affiliation:
1. Michigan Center for Theoretical Physics, University of Michigan, Ann Arbor, MI 48109, USA
Abstract
A sterile neutrino is a well-motivated and widely studied dark matter (DM) candidate. The most straightforward realization of sterile neutrino DM, through the Dodelson–Widrow (DW) mechanism, is now ruled out by a combination of X-ray and Lyman-[Formula: see text] measurements. An alternative production mechanism that is becoming increasingly popular in the literature is the freeze-in mechanism, involving frameworks where a feeble coupling to a particle — usually a scalar beyond the Standard Model — in the thermal bath results in a gradual accumulation of the sterile neutrino DM abundance. This paper reviews the various motivations for realizing such frameworks in the literature, their common characteristic features and phenomenological signatures.
Publisher
World Scientific Pub Co Pte Lt
Subject
General Physics and Astronomy,Astronomy and Astrophysics,Nuclear and High Energy Physics
Cited by
56 articles.
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