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Gravitational Baryogenesis and Dark Matter from Light Black Holes
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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.
Forward citations
Cited by 3 Pith papers
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Baryogenesis via Asymmetric Evaporation of Primordial Black Holes
Evaporating primordial black holes, biased by a new gravitational interaction, can reproduce the observed baryon asymmetry once entropy dilution and chemical-potential-dependent emission are included.
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The Magnetic Origin of Primordial Black Holes: A Viable Dark Matter Scenario
Primordial black holes formed from magnetically induced density fluctuations could explain all dark matter, but only in a finely tuned parameter window.
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Asymmetries from a charged memory-burdened PBH
A parameter-space scan shows that very large curvature-current couplings can fit the baryon asymmetry and dark matter abundance, while the electric charge of the black hole plays no role in the mechanism.
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