Document Type

Article

Publication Date

2-25-2020

Publication Title

PHYSICAL REVIEW LETTERS

Volume

124

Issue

8

Publisher Name

American Physical Society

Abstract

keV-scale gauge-singlet fermions, when allowed to mix with the active neutrinos, are elegant dark matter (DM) candidates. They are produced in the early Universe via the Dodelson-Widrow mechanism and can be detected as they decay very slowly, emitting x-rays. In the absence of new physics, this hypothesis is virtually ruled out by astrophysical observations. Here, we show that new interactions among the active neutrinos allow these sterile neutrinos to make up all the DM while safely evading all current experimental bounds. The existence of these new neutrino interactions may manifest itself in next-generation experiments, including DUNE.

Comments

Author Posting © The Authors, 2020. This article is posted here by permission of The Authors for personal use, not for redistribution. The article was published in JOURNAL, Volume 124, Issue 8, February 2020, https://doi.org/10.1103/PhysRevLett.124.081802

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Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.

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