Baryogenesis and lepton number violation

TL;DR

This paper explores how the decay of heavy Majorana neutrinos in an SO(10) framework can generate the universe's matter-antimatter asymmetry through lepton number violation and electroweak processes.

Contribution

It provides a detailed analysis of leptogenesis via right-handed neutrino decay within an SO(10) model, including neutrino mass matrices and physical implications.

Findings

Leptogenesis can successfully explain baryon asymmetry.

The model incorporates three right-handed neutrinos.

Neutrino mass matrices are consistent with observed neutrino properties.

Abstract

The cosmological baryon asymmetry can be explained by the nonperturbative electroweak reprocessing of a lepton asymmetry generated in the out-of-equilibrium decay of heavy right-handed Majorana neutrinos. We analyze this mechanism in detail in the framework of a SO(10)-subgroup. We take three right-handed neutrinos into account and discuss physical neutrino mass matrices.