Neutrino Parameters, Abelian Flavor Symmetries, and Charged Lepton Flavor Violation

TL;DR

This paper explores how supersymmetric Abelian flavor models relate neutrino parameters to charged lepton processes, identifying experimental bounds and future detection prospects for lepton flavor violation.

Contribution

It analyzes the implications of neutrino mass models on charged lepton flavor violation, excluding some models and proposing new ones with suppressed rates.

Findings

Current models are constrained or excluded by experimental bounds.

Many models predict detectable rates in upcoming experiments.

Some models suppress flavor violation below experimental sensitivities.

Abstract

Neutrino masses and mixings have important implications for models of fermion masses, and, most directly, for the charged lepton sector. We consider supersymmetric Abelian flavor models, where neutrino mass parameters are related to those of charged leptons and sleptons. We show that processes such as \tau to \mu\gamma, \mu to e\gamma and \mu-e conversion provide interesting probes. In particular, some existing models are excluded by current bounds, while many others predict rates within reach of proposed near future experiments. We also construct models in which the predicted rates for charged lepton flavor violation are below even the proposed experimental sensitivities, but argue that such models necessarily involve loss of predictive power.