Primordial black hole evaporation and dark matter production. II. Interplay with the freeze-in or freeze-out mechanism

Cheek, Andrew; Heurtier, Lucien; Perez-Gonzalez, Yuber F.; Turner, Jessica

doi:10.1103/physrevd.105.015023

Cited by 43 publications

(25 citation statements)

References 47 publications

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“…Refs. [21,36,[40][41][42][43][44] that the entropy injection from PBHs can affect the viable parameter space of baryogenesis and dark matter production, and therefore, such an effect cannot be neglected. Applying the dilution factor of Eq.…”

Section: Pbh-assisted Baryogenesismentioning

confidence: 99%

Rescuing High-Scale Leptogenesis using Primordial Black Holes

Bernal,

Fong,

Perez-Gonzalez

et al. 2022

Preprint

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We explore the interplay between light primordial black holes (PBH) and highscale baryogenesis, with a particular emphasis on leptogenesis. We first review a generic baryogenesis scenario where a heavy particle, X, with mass, M X , produced solely from PBH evaporation decays to generate a baryon asymmetry. We show that the viable parameter space is bounded from above by M X 10 17 GeV and increases with decreasing M X . We demonstrate that regions of the leptogenesis parameter space, where the lightest right-handed neutrino (RHN) mass M N 1 10 15 GeV and neutrino mass scale m ν 0.1 eV, excluded in standard cosmology due to ∆L = 2 washout processes, becomes viable with the assistance of light PBHs. This scenario of PBH-assisted leptogenesis occurs because the PBHs radiate RHNs via Hawking evaporation late in the Universe's evolution when the temperature of the thermal plasma is low relative to the RHN mass. Subsequently, these RHNs can decay and produce a lepton asymmetry while the washout processes are suppressed.

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Section: Pbh-assisted Baryogenesismentioning

confidence: 99%

Rescuing High-Scale Leptogenesis using Primordial Black Holes

Bernal,

Fong,

Perez-Gonzalez

et al. 2022

Preprint

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“…It is important to emphasize that these results where obtained using the numerical code developed in Ref. [15,16], including the additional ALP degree of freedom. We have checked that the numerical estimations in Eq.…”

Section: Alp Dark Mattermentioning

confidence: 99%

“…On the contrary, light PBHs could have also been created, and have not a less interesting phenomenology. For example, in their evaporation process they can source particle DM or dark radiation (DR) [5][6][7][8][9][10][11][12][13][14][15][16][17], trigger baryogenesis [18][19][20][21][22], and radiate all new degrees of freedom, such as right-handed neutrinos [23]. Along the same research direction, in this work we focus on phenomenology of QCD axion and axion-like particles (ALPs) in a Universe dominated by PBHs lighter than ∼ 10 9 g, which have fully evaporated before Big Bang nucleosynthesis (BBN).…”

Section: Introductionmentioning

confidence: 99%

“…For the case with an early PBH era, we numerically solve a system of coupled Boltzmann equations for the background (PBHs and SM radiation) based on the code developed in Refs. [15,16], carefully including the greybody factor in PBHs spectra, and considering the effect of the PBH angular momentum. We find an increased allowed parameter space with larger f a or, equivalently, smaller ALP-photon coupling g aγ due to the entropy injection from PBH evaporation.…”

Section: Introductionmentioning

confidence: 99%

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ALP Dark Matter in a Primordial Black Hole Dominated Universe

Bernal,

Perez-Gonzalez,

et al. 2021

Preprint

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We investigate the phenomenological consequences of axion-like particle (ALP) dark matter with an early matter domination triggered by primordial black holes (PBHs). We focus on light BHs with masses smaller than ∼ 10 9 g which fully evaporate before Big Bang nucleosynthesis. We numerically solve the coupled Boltzmann equations, carefully taking the greybody factors and BH angular momentum into account. We find that the entropy injection from PBH evaporation dilutes the ALP relic abundance originally produced via the vacuum misalignment mechanism, opening the parameter space with larger scales f a or, equivalently, smaller ALP-photon couplings g aγ , within the reach of future detectors as ABRACADABRA, KLASH, ADMX, and DM-Radio. Moreover, the ALP minicluster masses can be several orders of magnitude larger if the early Universe features an PBH dominated epoch. For the relativistic ALPs produced directly from Hawking radiation, we find that their contribution to the dark radiation is within the sensitivity of next generation CMB experiments. For the sake of completeness, we also revisit the particular case of the QCD axion.

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“…PBHs, and particularly PBH dominated eras, can have a number of phenomenological consequences in the early universe. For instance, they can trigger baryogenesis [34][35][36], or radiate DM or dark radiation via their Hawking evaporation [37][38][39][40][41][42][43][44][45][46][47][48], or even source DM, baryogenesis and density perturbations simultaneously [49]. Moreover, they may also play an important role in neutrino physics, like sourcing massive neutrinos [50,51] or leaving a signal on the neutrino floor [52].…”

Section: Introductionmentioning

confidence: 99%

Dark matter in the time of primordial black holes

Bernal

Zapata

2021

J. Cosmol. Astropart. Phys.

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We investigate the production of QCD axion dark matter in a nonstandard cosmological era triggered by primordial black holes (PBHs) that fully evaporate before the onset of BBN. Even if PBHs cannot emit the whole axion cold dark matter abundance through Hawking radiation, they can have a strong impact on the dark matter produced via the misalignment mechanism. First, the oscillation temperature of axions reduces if there is a PBH dominated era, and second, PBH evaporation injects entropy to the standard model, diluting the axion relic abundance originally produced. The axion window is therefore enlarged, reaching masses as light as ∼ 10 −8 eV and decay constants as large as f a ∼ 10 14 GeV without fine tuning the misalignment angle. Such small masses are in the reach of future detectors as ABRACADABRA, KLASH, and ADMX, if the axion couples to photons. Additionally, the axions radiated by PBHs contribute to ∆N eff within the projected reach of the future CMB Stage 4 experiment.

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Primordial black hole evaporation and dark matter production. II. Interplay with the freeze-in or freeze-out mechanism

Cited by 43 publications

References 47 publications

Rescuing High-Scale Leptogenesis using Primordial Black Holes

Rescuing High-Scale Leptogenesis using Primordial Black Holes

ALP Dark Matter in a Primordial Black Hole Dominated Universe

Dark matter in the time of primordial black holes

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