Lepton Flavour Violation in SUSY-seesaw: an update

TL;DR

This paper updates predictions for lepton flavor violating decays in a SUSY-seesaw framework, analyzing how different SUSY breaking scenarios affect observable rates and their compatibility with experimental bounds.

Contribution

It provides new predictions for lepton flavor violation in SUSY-seesaw models considering universal and non-universal SUSY breaking scenarios.

Findings

Predictions for tau and muon decay rates are updated.

Certain processes are identified as promising for future experimental detection.

Comparison with current bounds constrains SUSY-seesaw parameter space.

Abstract

Here we update the predictions for lepton flavour violating tau and muon decays, $l_j \to l_i \gamma$, $l_j \to 3 l_i$, and $\mu-e$ conversion in nuclei. We work within a SUSY-seesaw context where the particle content of the Minimal Supersymmetric Standard Model is extended by three right handed neutrinos plus their corresponding SUSY partners, and where a seesaw mechanism for neutrino mass generation is implemented. Two different scenarios with either universal or non-universal soft supersymmetry breaking Higgs masses at the gauge coupling unification scale are considered. After comparing the predictions with present experimental bounds and future sensitivities, the most promising processes are particularly emphasised.