Minimal Resonant Leptogenesis and Lepton Flavour Violation

TL;DR

This paper presents a minimal non-supersymmetric resonant leptogenesis model based on approximate flavour symmetries, demonstrating how three heavy Majorana neutrinos can generate the observed matter-antimatter asymmetry and predict observable lepton flavour violation.

Contribution

It introduces a minimal resonant leptogenesis framework with radiatively generated neutrino mass splittings, requiring only three heavy neutrinos for successful leptogenesis and testable lepton flavour violation signals.

Findings

Successful leptogenesis with three heavy Majorana neutrinos.

Predicted rates for mu --> e gamma and mu --> e conversion.

Radiative generation of neutrino mass splittings.

Abstract

We discuss minimal non-supersymmetric models of resonant leptogenesis, based on an approximate flavour symmetries. As an illustrative example, we consider a resonant tau-leptogenesis model, compatible with universal right-handed neutrino masses at the GUT scale, where the required heavy-neutrino mass splittings are generated radiatively. In particular, we explicitly demonstrate, how a minimum number of three heavy Majorana neutrinos is needed, in order to obtain successful leptogenesis and experimentally testable rates for processes of lepton flavour violation, such as mu --> e gamma and mu --> e conversion in nuclei.