Seminarium Kosmologia i Fizyka Cząstek

The evolution of dark matter is significantly altered, when it annihilates in the vicinity of Breit-Wigner resonance. First I will discuss the dependence of thermally averaged cross-sections on the shape of the resonance and present the approximate formulas for the relic abundance. In the next part I will focus on an idea of the self-interacting dark matter. The enhancement of the self-interaction rates from the Higgs resonance will be illustrated within the Abelian vector dark matter model. Finally, I will comment on bounds coming from the indirect searches with the Fermi-LAT targeting dwarf spheroidal galaxies.