Revisiting the Affleck-Dine mechanism for primordial black hole formation
Abstract We study a primordial black hole (PBH) formation scenario based on the Affleck-Dine (AD) mechanism and investigate two PBH mass regions: M ∼ 30 M ⊙ motivated by the LIGO-Virgo observations of the binary black hole mergers and M ≳ 10 4 M ⊙ motivated by the observations of supermassive black...
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Published in | Journal of cosmology and astroparticle physics Vol. 2022; no. 10; pp. 48 - 75 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Bristol
IOP Publishing
01.10.2022
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Subjects | |
Online Access | Get full text |
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Summary: | Abstract
We study a primordial black hole (PBH) formation scenario based on the Affleck-Dine (AD)
mechanism and investigate two PBH mass regions:
M
∼ 30
M
⊙
motivated by the LIGO-Virgo
observations of the binary black hole mergers and
M
≳ 10
4
M
⊙
motivated by the
observations of supermassive black holes at the center of galaxies. In the previous studies, it
has been considered that the inhomogeneous AD baryogenesis generates regions with a large baryon
asymmetry, some of which collapse into PBHs. In this paper, we show that this scenario is
severely constrained due to the baryon asymmetry remaining outside PBHs, which would spoil the
success of the big bang nucleosynthesis. Then, we propose an alternative scenario where the AD
leptogenesis results in the inhomogeneous formation of Q-balls with lepton charges, which collapse
into PBHs. As a result, we find that our scenario can explain the favorable PBH abundance without
conflicting with the observational constraints. |
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ISSN: | 1475-7516 1475-7516 |
DOI: | 10.1088/1475-7516/2022/10/048 |