Exchange driven freeze out of dark matter

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.

arXiv comment13 pages and 5 figures; matches published version

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• Manifesting hidden dynamics of a sub-component dark matter
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• Dark Freeze-out Cogenesis
• An update on the two singlet Dark Matter model
• Dynamics of the pseudo-FIMP in presence of a thermal Dark Matter
• The hierarchy problem and the vacuum stability in two-scalar dark matter model
• Bouncing Dark Matter
• Electroweak Phase Transition, Gravitational Waves and Collider Probes in Multi-Scalar Dark Matter Scenarios
• Two Component Doublet-Triplet Scalar Dark Matter stabilising the Electroweak vacuum
• Reviving $Z^{\prime }$ Portal Dark Matter with Conversion Mechanism
• Impact of conversion-driven processes on singlet-doublet Majorana dark matter relic
• Dark Matter in Multi-Singlet Extensions of the Standard Model