Gravitational Baryogenesis and Dark Matter from Light Black Holes

Understand

We study a scenario in which the baryon asymmetry is created through Hawking radiation from primordial black holes via a dynamically-generated chemical potential.

• This mechanism can also be used to generate the observed dark matter abundance, regardless of whether or not the black holes fully evaporate.
• In the case that evaporation ceases, the observed dark matter abundance is generically comprised of both relic black holes and an asymmetric dark matter component.
• We show that this two-component dark matter scenario can simultaneously account for the observed baryon asymmetry and the cosmological dark matter, a possibility which evades constraints on either individual candidate.