Cosmic Coincidences of Primordial-Black-Hole Dark Matter - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review Letters Année : 2022

Cosmic Coincidences of Primordial-Black-Hole Dark Matter

Résumé

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.

Dates et versions

hal-03366118 , version 1 (05-10-2021)

Identifiants

Citer

Yi-Peng Wu, Elena Pinetti, Joseph Silk. Cosmic Coincidences of Primordial-Black-Hole Dark Matter. Physical Review Letters, 2022, 128 (3), pp.031102. ⟨10.1103/PhysRevLett.128.031102⟩. ⟨hal-03366118⟩
42 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More