Speaker
Description
Primordial black holes can act as non-thermal sources of dark matter through Hawking evaporation, but the viable parameter space depends sensitively on greybody factors, massive-particle thresholds, and the full particle content of the dark sector. In this talk, I will examine the efficiency of the process by which a black hole dumps its mass into the creation of a population of dark matter particles. Using minimal supersymmetry as a test case, I will present improved semi-analytic calculations of PBH emission rates, validated against a modified version of BlackHawk that incorporates realistic supersymmetric spectra rather than a single dark matter degree of freedom. I will show that including the full heavy SUSY sector, especially the scalar-rich part of the spectrum, and the cascade decays into the lightest supersymmetric particle significantly enlarges the allowed PBH–dark matter parameter space and lowers the PBH abundance required to explain the observed relic density.