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Primordial Black Holes Are True Vacuum Nurseries
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abstract
The Hawking evaporation of primordial black holes (PBH) reheats the Universe locally, forming hot spots that survive throughout their lifetime. We propose to use the temperature profile of such hot spots to calculate the decay rate of metastable vacua in cosmology, avoiding inconsistencies inherent to the Hartle-Hawking or Unruh vacuum. We apply our formalism to the case of the electroweak vacuum stability and find that a PBH energy fraction $\beta > 7\times 10^{-80} (M/g)^{3/2}$ is ruled out for black holes with masses $0.8 g < M < 10^{15} g$.
Forward citations
Cited by 4 Pith papers
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Revisiting PBH accretion, evaporation and their cosmological consequences
Relativistic accretion onto Kerr primordial black holes gives roughly 4.5x mass growth and fast spin-down, strengthening BBN bounds, lowering the survival mass to ~2.7e14 g, and erasing the high-frequency stochastic g...
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Comprehensively Constraining Ultra-Light Primordial Black Holes Through Relic Formation and Early Mergers
Ultra-light primordial black holes that evaporate before Big Bang nucleosynthesis can still be probed through Planck-mass relics and early binary mergers, leaving a narrow window where relics make up all dark matter.
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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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Black holes in thermal bath live shorter: implications for primordial black holes
A black hole in a hot thermal bath is claimed to emit more Hawking radiation and evaporate sooner, but the paper neglects absorption of the bath, which can make the black hole grow instead.
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