Exchange driven freeze out of dark matter
Tarak Nath Maity, Tirtha Sankar Ray
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.
Topics & Concepts
Dark matterMixed dark matterLight dark matterDark fluidWarm dark matterPhysicsScalar field dark matterSimple (philosophy)Hot dark matterAstrophysicsDark energyCosmologyPhilosophyEpistemologyDark Matter and Cosmic PhenomenaCosmology and Gravitation TheoriesParticle physics theoretical and experimental studies