Seminarium Kosmologia i Fizyka Cząstek

I will examine the relic abundance of supersymmetric dark matter in a scenario where the reheating temperature T_R of the Universe after inflation is low, in the range of tens or of hundreds of GeV. To this end I will solve the Boltzmann equation during and after the period of reheating. I will consider several candidates for the lightest supersymmetric particle (LSP) as a dark matter candidate. In the case of the neutralino LSP, large new regions of parameter space open up, depending on the value of reheating temperature. Gravitino and axino as dark matter in a low T_R regime will be also presented.