Seminarium "Teoria cząstek elementarnych i kosmologia"

The process of thermal freeze-out of multicomponent dark matter (DM) can be significantly more complex and richer than the usual simple single-WIMP scenario. In this talk I will discuss some of the recent progress in understanding the impact of non-equilibrium effects on dark matter production, in particular in multicomponent scenarios. First I will present a framework for performing calculations beyond kinetic equilibrium and then discuss the latest results regarding impact of processes affecting the momentum distribution, like semi-annihilation, cannibalization, conversions and also DM self-scatterings. Finally, I will comment on the status of the state-of-the-art multicomponent dark matter relic density calculations.