Leptogenesis in SO(10) models with a left-right symmetric seesaw mechanism

TL;DR

This paper investigates leptogenesis within supersymmetric SO(10) models incorporating a left-right symmetric seesaw mechanism, analyzing how different right-handed neutrino spectra can produce the observed matter-antimatter asymmetry.

Contribution

It demonstrates that successful leptogenesis can occur in specific right-handed neutrino mass spectra under certain assumptions, emphasizing the importance of charged fermion mass modeling.

Findings

Successful leptogenesis in 4 out of 8 neutrino mass spectra

Leptogenesis viability depends on charged fermion mass descriptions

Inclusion of flavour effects and next-to-lightest neutrino contribution

Abstract

We study leptogenesis in supersymmetric SO(10) models with a left-right symmetric seesaw mechanism, including flavour effects and the contribution of the next-to-lightest right-handed neutrino. Assuming M_D = M_u and hierarchical light neutrino masses, we find that successful leptogenesis is possible for 4 out of the 8 right-handed neutrino mass spectra that are compatible with the observed neutrino data. An accurate description of charged fermion masses appears to be an important ingredient in the analysis.