Baryogenesis at the QCD Scale

TL;DR

This paper introduces a novel baryogenesis mechanism at the QCD scale involving domain walls and metastable vacua, which could explain matter-antimatter asymmetry and contribute to dark matter.

Contribution

It presents a new charge separation process using domain walls and metastable vacua, linking baryogenesis with dark matter in a nonperturbative QCD framework.

Findings

Domain walls acquire fractional baryon charge.

Metastable vacuum regions contribute to dark matter.

Proposed mechanism explains matter-antimatter asymmetry.

Abstract

We propose a new mechanism for explaining the observed asymmetry between matter and antimatter, based on nonperturbative physics at the QCD scale. Our mechanism is a charge separation scenario, making use of domain walls separating the recently discovered long-lived metastable vacua from the lowest energy vacuum. The walls acquire a fractional negative baryon charge, leaving behind a compensating positive baryon charge in the bulk. The regions of metastable vacuum bounded by walls ("B-shells") will contribute to the dark matter of the Universe.