Leptogenesis in Majoron Models without Domain Walls

TL;DR

This paper proposes extensions to Majoron models with right-handed doublets and triplets that avoid domain wall issues, thereby enhancing the viability of leptogenesis mechanisms for explaining matter-antimatter asymmetry.

Contribution

It introduces new Majoron model extensions that prevent domain wall formation and explores their implications for leptogenesis and baryon asymmetry.

Findings

Extensions successfully prevent domain wall formation

Impacts on lepton-to-baryon asymmetry conversion

Potential for more consistent leptogenesis models

Abstract

The emergence of domain walls is a well-known problem in Majoron models for neutrino mass generation. Here, we present extensions of the Majoron model by right-handed doublets and triplets that prevent domain walls from arising. These extensions are highly interesting in the context of Leptogenesis as they impact the conversion of a lepton asymmetry to a baryon asymmetry by Sphaleron processes.