Asymmetric baryon capture by primordial black holes and baryon asymmetry of the universe

TL;DR

This paper refines a model where primordial black holes asymmetrically capture baryons and antibaryons, potentially explaining the universe's baryon asymmetry, especially when heavy baryon interactions are weak, broadening the parameter space for the effect.

Contribution

It introduces an enhanced scenario for baryon asymmetry generation via asymmetric black hole capture, considering weak interactions of heavy baryons, expanding previous models.

Findings

Asymmetry can be significantly enhanced with weak heavy baryon interactions.

Observed baryon asymmetry magnitude achievable across various model parameters.

Refined scenario broadens the conditions under which baryon asymmetry can be generated.

Abstract

We have refined our previously suggested scenario of generation of the cosmological baryon asymmetry through an asymmetric capture of baryons and antibaryons by primordial block hole arXiv:2009.04361. It is found that in the limit of weak interactions of hypothetical heavy baryons with the primeval plasma the effect can be strongly enhanced and the observed magnitude of the asymmetry can be obtained for a wide range of the model parameters.