Probing neutrino masses and tri-bimaximality with lepton flavor violation searches

TL;DR

This paper explores how upcoming lepton flavor violation experiments can shed light on neutrino masses and mixing patterns, especially deviations from tri-bimaximal mixing, with implications for neutrino hierarchy.

Contribution

It links lepton flavor violation predictions to neutrino mass spectrum and mixing angles, considering simple models of heavy neutrinos and supersymmetry.

Findings

Tau to mu gamma decay discovery indicates neutrino mass hierarchy.

Large reactor angle (~0.1) is crucial for determining neutrino hierarchy.

Upcoming experiments can test neutrino mass and mixing models.

Abstract

We examine relation between neutrino oscillation parameters and prediction of lepton flavor violation, in light of deviations from tri-bimaximal mixing. Our study shows that upcoming experimental searches for lepton flavor violation process can provide useful implications for neutrino mass spectrum and mixing angles. With simple structure of heavy right-handed neutrino and supersymmetry breaking sectors, the discovery of tau \to mu gamma decay determines neutrino mass hierarchy if large (order 0.1) reactor angle is established.