Seminarium "High Energy, Cosmology and Astro-particle Physics (HECA)"

Scenarios of non-minimal dark matter (DM) contents and interactions inside a dark sector have drawn considerable attention, partially because of their abilities to resolve various phenomenological issues and provide extra power to many current/future experiments of searching for their signals in new and creative ways. In this talk, by taking a two-component DM scenario as an example, we demonstrate that multi-component DM scenarios can exhibit unique cosmological dynamics called 'self-heating'. During the self-heating epoch, a strongly self-interacting sub-component DM dynamically develops higher temperature than the SM one. We discuss the possible cosmological/astrophysical imprints from the temperature enhancement. Notably, we demonstrate that the warm DM constraints can be complementary to missing-energy/momentum experiments while providing additional information about the multi-component feature of DM.

Reference: arXiv:2111.06808 (hep-ph)

https://us02web.zoom.us/j/85478248551