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Title: Cosmic Coincidences of Primordial-Black-Hole Dark Matter

Journal Article · · Physical Review Letters
ORCiD logo [1]; ORCiD logo [2];  [3]
  1. CNRS and Sorbonne Univ., Paris (France)
  2. CNRS and Sorbonne Univ., Paris (France); Univ. of Torino and INFN (Italy); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  3. CNRS and Sorbonne Univ., Paris (France); Johns Hopkins Univ., Baltimore, MD (United States); Univ. of Oxford (United Kingdom). Beecroft Institute of Particle Astrophysics and Cosmology

If primordial black holes (PBHs) contribute more than 10% of the dark matter (DM) density, their energy density today is of the same order as that of the baryons. Such a cosmic coincidence might hint at a mutual origin for the formation scenario of PBHs and the baryon asymmetry of the Universe. Baryogenesis can be triggered by a sharp transition of the rolling rate of inflaton from slow-roll to (nearly) ultraslow-roll phases that produce large curvature perturbations for PBH formation in single-field inflationary models. We show that the baryogenesis requirement drives the PBH contribution to DM, along with the inferred PBH mass range, the resulting stochastic gravitational wave background frequency window, and the associated cosmic microwave background tensor-to-scalar ratio amplitude, into potentially observable regimes.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
Agence Nationale de la Recherche (ANR); European Union Horizon 2020; Italian Ministry of Education, University and Research (MIUR); USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1844788
Report Number(s):
FERMILAB-PUB-21-784-T; arXiv:2109.09875; oai:inspirehep.net:1925169
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 3 Vol. 128; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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