Skip to Main content Skip to Navigation
Preprints, Working Papers, ...

The cosmic coincidences of primordial-black-hole dark matter

Abstract : If primordial black holes (PBHs) contribute more than 10 percent 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) ultra-slow-roll phases that produces 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.
Complete list of metadata
Contributor : Inspire Hep Connect in order to contact the contributor
Submitted on : Tuesday, October 5, 2021 - 3:10:05 PM
Last modification on : Tuesday, October 19, 2021 - 7:01:48 PM

Links full text



Yi-Peng Wu, Elena Pinetti, Joseph Silk. The cosmic coincidences of primordial-black-hole dark matter. 2021. ⟨hal-03366118⟩



Record views