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arXiv · 1908.10343

Exchange driven freeze out of dark matter

Tarak Nath Maity·Tirtha Sankar Ray
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Abstract

We introduce a novel mechanism where processes that preserve the number density of the dark sector set the relic density of a thermal particulate dark matter. In a relatively degenerate multipartite dark sector if there is a considerable time lapse between the freeze out of various species then a process like exchange between dark sector constituents can play the pivotal role of driving freeze out and setting dark matter relic density. As a proof of principle, we present simple scalar models with viable dark matter in the GeV scale to demonstrate this phenomenon.

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Tarak Nath Maity, Tirtha Sankar Ray. 2019-08-27. Exchange driven freeze out of dark matter. https://doi.org/10.1103/physrevd.101.103013

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