Dilution of baryon asymmetry in the early universe due to primordial blackhole decay

TL;DR

This paper investigates how primordial black hole decay in the early universe can dilute baryon asymmetry, analyzing the process through various models and spectra to understand its cosmological implications.

Contribution

It introduces a detailed analysis of baryon asymmetry dilution due to primordial black hole decay using multiple models and realistic spectra.

Findings

Primordial black hole decay can significantly dilute baryon asymmetry.

The decay process affects the evolution of the cosmological scale factor.

The study provides quantitative estimates of dilution under different scenarios.

Abstract

Primordial black holes which are created at the very early universe can get decayed in the matter dominated era and thus produce photons, hence resulting in dilution of the baryon asymmetry and evolution of the cosmological scale factor. This process is tested and calculated by considering instant decay approximation, the realistic model of universe expansion and also considering the LogNormal spectrum of the primordial blackholes.