Axiogenesis from $SU(2)_R$ phase transition

TL;DR

This paper explores how a phase transition in an extended gauge symmetry involving $SU(2)_R$ could explain the universe's matter-antimatter asymmetry, linking it to axion dark matter production and collider constraints.

Contribution

It introduces a minimal Standard Model extension with $SU(2)_R$ gauge symmetry, connecting baryogenesis, axion dark matter, and collider phenomenology in a novel framework.

Findings

Parameter space constrained by gauge boson searches

High-luminosity LHC will probe remaining viable regions

Mass scale of $SU(2)_R$ linked to axion decay constant

Abstract

The baryon asymmetry of the universe may be explained by rotations of the QCD axion in field space and baryon number violating processes. We consider the minimal extension of the Standard Model by a non-Abelian gauge interaction, $SU(2)_R$, whose sphaleron process violates baryon number. Assuming that axion dark matter is also created from the axion rotation by the kinetic misalignment mechanism, the mass scale of the $SU(2)_R$ gauge boson is fixed as a function of the QCD axion decay constant, and vise versa. Significant portion of the parameter space has already been excluded by new gauge boson searches, and the high-luminocity LHC will further probe the viable parameter space.