Stability and leptogenesis in left-right symmetric seesaw models

TL;DR

This paper investigates how stability and leptogenesis viability can distinguish among degenerate solutions in left-right symmetric seesaw models, reducing the ambiguity in right-handed neutrino mass matrices.

Contribution

It introduces a method to use stability and leptogenesis criteria to discriminate among degenerate solutions in these models.

Findings

Stability and leptogenesis criteria help reduce degeneracy.

Partially lifts the eight-fold degeneracy.

Provides a way to select physically viable solutions.

Abstract

In left-right symmetric seesaw models an eight-fold degeneracy among the right-handed neutrino mass matrices is known to exist. We use stability and viability of leptogenesis as criteria in order to discriminate among the degenerate solutions and to partially lift the eight-fold degeneracy.