# Charged lepton flavour violation from low scale seesaw neutrinos

## TL;DR

This paper investigates how low-scale seesaw neutrinos influence charged lepton flavor violation, predicting potentially observable Z boson decay rates into different flavor leptons at future colliders.

## Contribution

It provides a detailed numerical analysis of Z boson decay rates within the Inverse Seesaw model, highlighting possible observable signals in tau-muon and tau-electron channels.

## Key findings

- Branching ratios up to 10^{-7} predicted for certain decays.
- Heavy neutrinos with TeV-scale masses are consistent with these predictions.
- Potential detectability at next-generation colliders.

## Abstract

In the work presented here, we have studied the impact of right handed neutrinos, which are introduced to account for the evidence of neutrino masses, on charged lepton flavour violating observables. In particular, we have focused on the loop induced decays of the Z boson into two leptons of different flavour. We have performed a numerical study of the rates predicted for these processes within the Inverse Seesaw model, specifically considering scenarios where $ \mu -e $ transitions are suppressed. Our conclusion, after comparison with the most relevant experimental constraints, is that branching ratios as large as $ 10^{-7} $ can be predicted in the $ \tau -\mu $ or $ \tau -e $ channels, together with heavy neutrinos having masses of the TeV order. Such rates could be accessible at next generation colliders.