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Primordial Black Hole Reheating
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Post-inflationary reheating phase is usually said to be solely governed by the decay of coherently oscillating inflaton into radiation. In this submission, we explore a new avenue toward reheating through the evaporation of primordial black holes (PBHs). After the inflation, if PBHs form, depending on its initial mass, abundance, and inflaton coupling with the radiation, we found two physically distinct possibilities of reheating the universe. In one possibility, the thermal bath is solely obtained from the decay of PBHs while inflaton plays the role of dominant energy component in the entire process. In the other possibility, we found that PBHs itself dominate the total energy budget of the Universe during the course of evolution, and then its subsequent evaporation leads to radiation dominated universe. Furthermore, we analyze the impact of both monochromatic and extended PBH mass functions and estimate the detailed parameter ranges for which those distinct reheating histories are realized.
Forward citations
Cited by 8 Pith papers
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Post-Inflationary Constraints on Nonminimally Coupled Quintessential Inflation
Gravitational-wave constraints on the reheating temperature rule out single-exponential nonminimally coupled quintessential inflation and require a double-exponential coupling that predicts thawing dark energy with w0...
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Burdening (or not) gravitational waves in the presence of primordial black holes
A single gravitational wave template combining inflaton and evaporating primordial black hole sources, with and without memory burden, yields new frequency-ratio signatures for testing black hole evaporation.
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The Dual Primordial Black Hole Formation Scenario
A single small-scale perturbation can form ultralight black holes during a break in inflation and heavier black holes after inflation, linking reheating to 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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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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Phenomenological Constraints on Higgs reheating
For Higgs-portal reheating with a light inflaton, the combination of vacuum stability, perturbativity, and LHC constraints limits the reheating temperature to between roughly 3.4e6 and 3.9e12 GeV.
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Relativistic accretion and burdened primordial black holes
Combining relativistic accretion with memory-burdened evaporation widens the parameter space for primordial black holes as dark matter and changes dark matter and dark radiation emission predictions.
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New bounds on Memory Burdened Primordial Black Holes from Big Bang Nucleosynthesis
Memory-burdened primordial black holes lighter than 10^9 grams are newly constrained by Big Bang nucleosynthesis, with a residual unconstrained window around 1-100 grams for suppression index k=2.
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