Charged lepton-flavor violating processes and suppression of nonunitary mixing effects in low-scale seesaw models

TL;DR

This paper explores the inverse seesaw model's parameter space consistent with neutrino data, analyzing lepton flavor violation and proposing a symmetric neutrino mass structure that suppresses flavor-violating processes.

Contribution

It introduces a neutrino mass matrix structure within the inverse seesaw model that minimizes charged lepton flavor violation, supported by a symmetry-based model.

Findings

Identifies parameter regions compatible with neutrino oscillation data.

Shows that certain neutrino mass structures can suppress flavor-violating decay rates.

Proposes a symmetry-based model for such suppressed scenarios.

Abstract

We examine the parameter space region of the inverse seesaw model that is consistent with neutrino oscillation data. We focus on the correlation between the current limits from the search of the $\mu\to e\gamma$ lepton flavor violating decay and the non-standard effects associated with the presence of new heavy neutrino states. Unlike what we would expect from an inverse seesaw model, we present a structure for the neutrinos mass matrices in which the rates of charged lepton flavor-violating processes are negligible. Additionally, we provide a model based on symmetries for such a scenario.