Gauged B-L unification and cosmology

TL;DR

This paper explores the cosmological consequences of low-energy gauged B-L symmetry, highlighting how it can lead to leptogenesis through domain wall-driven phase transitions, with considerations for supersymmetric extensions.

Contribution

It introduces the idea that gauged B-L symmetry at low energies can naturally produce leptogenesis via domain wall dynamics, expanding understanding of baryogenesis mechanisms.

Findings

Leptogenesis can occur from domain wall driven first order phase transitions.

Gauged B-L symmetry impacts cosmological evolution and baryon asymmetry.

Supersymmetry considerations modify the phase transition dynamics.

Abstract

We discuss some cosmological implications of low energy gauged B-L symmetry with and without supersymmetry. Generic possibility of leptogenesis from a domain wall driven first order phase transition is shown to be a characteristic of such models.