Dark matter in the time of primordial black holes

Hawking evaporation of primordial black holes (PBH) with masses ranging from similar to 10(-1) to similar to 10(9) g can generate the whole observed dark matter (DM) relic density. However, a second DM production mechanism, like freeze-out or freeze-in, could have also been active in the early universe. Here we study the interplay of these mechanisms, focusing on the scenario where PBHs dominate the energy density of the universe, leading to a nonstandard cosmological era. For concreteness, we use the singlet scalar DM model as an example for this analysis.

Automated summary

This study examines the interplay between Hawking evaporation of primordial black holes and other dark matter production mechanisms in the early universe, using the singlet scalar DM model as an example for analysis.