SO(10) GUT Baryogenesis

TL;DR

This paper explores how GUT-baryogenesis in SO(10) models can be revived by considering lepton number violating processes that partially preserve the generated baryon asymmetry despite sphaleron effects.

Contribution

It demonstrates that certain lepton number violating processes can enable the survival of baryon asymmetry in SO(10) GUTs, offering a new perspective on baryogenesis.

Findings

Lepton number violating processes can partially wash out baryon asymmetry.

GUT-baryogenesis can be resurrected in SO(10) models.

Baryon asymmetry can survive sphaleron washout under specific conditions.

Abstract

Baryogenesis, through the decays of heavy bosons, was considered to be one of the major successes of the grand unified theories (GUTs). It was then realized that the sphaleron processes erased any baryon asymmetry from the GUT-baryogenesis at a later stage. In this paper, we discuss the idea of resurrecting GUT-baryogenesis in a large class of SO(10) GUTs. Our analysis shows that fast lepton number violating but baryon number conserving processes can partially wash out the GUT-baryogenesis produced lepton and/or baryon asymmetry associated with or without the sphaleron and/or Yukawa interactions.