CPT violation and particle-antiparticle asymmetry in cosmology

TL;DR

This paper explores how CPT violation could contribute to the universe's matter-antimatter asymmetry, especially through effects on particle distributions, offering a potential explanation beyond mass differences.

Contribution

It discusses the possibility that CPT non-invariance can distort equilibrium distributions, providing a novel mechanism for baryon asymmetry.

Findings

CPT violation alone via mass differences is insufficient to explain baryon asymmetry.

Distortion of equilibrium distributions by CPT violation could account for matter-antimatter imbalance.

Theoretical considerations of CPT non-invariant effects in cosmology are presented.

Abstract

General features of generation of the cosmological charge asymmetry in CPT non-invariant world are discussed. If the effects of CPT violation manifest themselves only in mass differences of particles and antiparticles, the baryon asymmetry of the universe hardly can be explained solely by breaking of CPT invariance. However, CPT non-invariant theories may lead to a new effect of distorting the usual equilibrium distributions. If this takes place, CPT violation may explain the baryon asymmetry of the universe.