Lepton number violating mSUGRA and neutrino masses

TL;DR

This paper investigates how minimal supergravity models with GUT-scale lepton number violation can explain neutrino oscillation data using a simplified parameter set, impacting collider phenomenology and tuning considerations.

Contribution

It demonstrates that only two GUT-scale lepton number violating parameters and three charged lepton mixing angles are needed to fit neutrino oscillation data in mSUGRA models.

Findings

Two GUT-scale lepton number violating parameters suffice to explain neutrino data.

The simplified parameter space enables feasible collider studies.

Discussion of tuning issues in the model.

Abstract

We perform a quantitative study of neutrino phenomenology in the framework of minimal supergravity (mSUGRA) with grand unified theory (GUT)-scale tri-linear lepton number violation. We show that only two non-zero GUT scale lepton number violating parameters and three charged lepton mixing angles are sufficient to account for current neutrino oscillation data. This allows collider studies to be performed in a manageable parameter space. We discuss some phenomenological consequences of the models, including tuning issues.