Abstract
We propose a novel mechanism for the production of dark matter (DM) from a thermal bath based on the idea that DM particles can transform heat bath particles : . For a small initial abundance of , this leads to an exponential growth of the DM number density in close analogy to other familiar exponential growth processes in nature. We demonstrate that this mechanism complements freeze-in and freeze-out production in a generic way, opening new parameter space to explain the observed DM abundance, and we discuss observational prospects for such scenarios.
- Received 25 June 2021
- Revised 20 August 2021
- Accepted 14 September 2021
DOI:https://doi.org/10.1103/PhysRevLett.127.191802
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society
Physics Subject Headings (PhySH)
Erratum
Erratum: Dark Matter from Exponential Growth [Phys. Rev. Lett. 127, 191802 (2021)]
Torsten Bringmann, Paul Frederik Depta, Marco Hufnagel, Joshua T. Ruderman, and Kai Schmidt-Hoberg
Phys. Rev. Lett. 128, 069901 (2022)
synopsis
Exponentially Growing Dark Matter
Published 3 November 2021
A new model explains the current density of dark matter by proposing that conventional matter converted to dark matter in the early Universe.
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