Evaporation barrier for dark matter in celestial bodies

Acevedo, Javier F ORCID: 0000-0003-3666-0951, Leane, Rebecca K ORCID: 0000-0002-1287-8780 and Smirnov, Juri ORCID: 0000-0002-3082-0929 (2024) Evaporation barrier for dark matter in celestial bodies. Journal of Cosmology and Astroparticle Physics, 2024 (04). 038-038.

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Official URL: http://dx.doi.org/10.1088/1475-7516/2024/04/038

Abstract

<jats:title>Abstract</jats:title> <jats:p>The minimum testable dark matter (DM) mass for almost all DM signatures in celestial bodies is determined by the rate at which DM evaporates. DM evaporation has previously been calculated assuming a competition between the gravitational potential of the object, and thermal kicks from the celestial-body matter. We point out a new effect, where mediators with a range larger than the interparticle spacing induce a force proportional to the density gradient of celestial objects, forming an <jats:italic>evaporation barrier</jats:italic> for the DM. This effect can be so significant that evaporation does not occur even for sub-MeV DM, in stark contrast to previous calculations. This opens up a wide range of new light DM searches, many orders of magnitude in DM mass below the sensitivity of direct detection.</jats:p>

Item Type:	Article
Uncontrolled Keywords:	5106 Nuclear and Plasma Physics, 51 Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	08 Aug 2024 13:29
Last Modified:	08 Aug 2024 13:29
DOI:	10.1088/1475-7516/2024/04/038
Open Access URL:	https://arxiv.org/abs/2303.01516
Related URLs:	Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3183463