On baryogenesis from dark matter annihilation

TL;DR

This paper explores how dark matter annihilation could generate the universe's baryon asymmetry, proposing new models that do not require a light sterile sector and linking to neutrino masses.

Contribution

It demonstrates the feasibility of baryogenesis from dark matter annihilation without a light sterile sector and introduces models connecting to neutrino masses.

Findings

Baryon asymmetry can originate from dark matter annihilation.

Generation of asymmetry without a light sterile sector is possible.

Some models link baryogenesis to neutrino mass mechanisms.

Abstract

We study in detail the conditions to generate the baryon asymmetry of the universe from the annihilation of dark matter. This scenario requires a low energy mechanism for thermal baryogenesis, hence we first discuss some of these mechanisms together with the specific constraints due to the connection with the dark matter sector. Then we show that, contrary to what stated in previous studies, it is possible to generate the cosmological asymmetry without adding a light sterile dark sector, both in models with violation and with conservation of B-L. In addition, one of the models we propose yields some connection to neutrino masses.