Minimal seesaw models and minimal lepton flavor violation

TL;DR

This paper explores how a global U(1)_R symmetry influences minimal lepton flavor violation in type-I seesaw models, focusing on charged lepton flavor violation processes like mu to e gamma and mu to 3e.

Contribution

It introduces new minimal seesaw models with R-symmetry and analyzes their implications for charged lepton flavor violation phenomenology.

Findings

R-symmetry constrains neutrino mass models

Predictions for mu to e gamma and mu to 3e rates

Different R-charge assignments lead to distinct models

Abstract

We study the implications of the global $U(1)_R$ symmetry present in minimal lepton flavor violating implementations of the seesaw mechanism for neutrino masses. Our discussion is done in the context of explicit minimal type-I seesaw scenarios, where depending on the R-charge assignment different models can be constructed. We study the charged lepton flavor violating phenomenology of a concrete realization paying special attention to $\mu\to e\gamma$ and $\mu\to 3e$.