Non-resonant leptogenesis in seesaw models with an almost conserved B-L

TL;DR

This paper reviews leptogenesis mechanisms in seesaw models where lepton number is nearly conserved, highlighting the theoretical motivations and key results from recent research.

Contribution

It provides a comprehensive overview of non-resonant leptogenesis in models with approximate B-L conservation, emphasizing new insights into the generation of matter-antimatter asymmetry.

Findings

Leptogenesis can occur with nearly conserved B-L symmetry.

Seesaw models can produce sufficient baryon asymmetry without resonance.

Theoretical frameworks support leptogenesis in B-L conserving scenarios.

Abstract

We review the motivations and some results on leptogenesis in seesaw models with an almost conserved lepton number. The paper is based on a talk given at the 5th International Symposium on Symmetries in Subatomic Physics, SSP2012.