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Primordial Black Hole Baryogenesis
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We reconsider the possibility that the observed baryon asymmetry was generated by the evaporation of primordial black holes that dominated the early universe. We present a simple derivation showing that the baryon asymmetry is insensitive to the initial black hole density and the cosmological model but is sensitive to the temperature-dependence of the CP and baryon-violating (or lepton-violating) interactions. We also consider the possibility that black holes stop evaporating and form Planck-mass remnants that act as dark matter. We show that primordial black holes cannot simultaneously account for both the observed baryon asymmetry and the (remnant) dark matter density unless the magnitude of CP violation is much greater than expected from most particle physics models. Finally, we apply these results to ekpyrotic/cyclic models, in which primordial black holes may form when branes collide. We find that obtaining the observed baryon asymmetry is compatible with the other known constraints on parameters.
Forward citations
Cited by 11 Pith papers
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Baryogenesis via the CKM Matrix with Minimal Flavor Violation
An MFV leptoquark model shows that the CKM phase alone can in principle generate the observed baryon asymmetry without time-varying model parameters.
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Gravitational Waves from Black Hole Reheating: The Scalar-Induced Component
Accounting for the minimal mass spread of primordial black holes from gravitational collapse suppresses the Poltergeist GW background to the level of generic scalar-induced signals and reopens ultra-light PBH parameter space.
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Fine-tuning in mixed Dark Matter models with Primordial Black Hole relics
In mixed dark matter models combining Planck-mass black hole relics, Hawking-evaporated particles, and a WIMP, freeze-in, or axion component, the total abundance's fine-tuning is dominated by the primordial power spec...
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Eigenvalue formulation of Stochastic Inflation and application to large perturbation generating inflationary features
A new eigenvalue method is introduced to compute the PDF of stochastic e-folds in inflation, recovering a known flat-potential result and analyzing constant-drift cases in narrow and broad well limits.
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Opening the Window of Ultra-Light PBHs by Exorcising the Poltergeist
Incorporating the general-relativity mass tail df_PBH/d ln M ∝ M^3.78 smooths PBH evaporation, suppresses the scalar-induced GW signal by orders of magnitude, and reopens the ultra-light PBH window for the hot Big Bang.
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Page Time of Primordial Black Holes in the Standard Model and Beyond
For Standard Model emission, a Schwarzschild primordial black hole of about 6.23 x 10^14 grams would reach its Page time at the current age of the Universe.
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The Magnetic Origin of Primordial Black Holes: Ultralight PBHs and Secondary GWs
Inflationary magnetic fields induce curvature perturbations that form ultralight PBHs, generating a stochastic GW background with model-specific features.
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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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Multi-peaked high-frequency gravitational waves from PBH-assisted leptogenesis
PBH-assisted leptogenesis produces a multi-peaked GW spectrum in the MHz-EHz range from RHN graviton bremsstrahlung plus PBH-related sources.
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Probing Double-Peaked Gamma-Ray Spectra from Primordial Black Holes with Next-Generation Gamma-Ray Experiments
A likelihood forecast shows e-ASTROGAM could, in parts of the f1-f2 plane, distinguish double-peaked from single-peaked PBH gamma-ray spectra in the 1e15 to 1e17 g mass 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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