Lepton Flavour Violation in Hadron Decays of the Tau Lepton within the Littlest Higgs Model with T-parity

TL;DR

This paper investigates lepton flavor violating tau decays involving hadrons within the Littlest Higgs model with T-parity, showing predicted decay rates close to current experimental limits, thus motivating future searches for new physics.

Contribution

It provides the first detailed analysis of hadronic lepton flavor violating tau decays in the Littlest Higgs model with T-parity, including extensions with Majorana neutrinos.

Findings

Predicted decay rates are within one order of magnitude of current experimental limits.

Inclusion of Majorana neutrinos slightly enhances decay rate predictions.

Results support ongoing experimental searches for lepton flavor violation as probes of new physics.

Abstract

We first study the hadronic lepton flavor violating tau decays within the littlest Higgs model with T-parity (including one or two pseudoscalars, or a vector resonance). We consider the case where only T-odd particles and partner fermions contribute, and also its extension including Majorana neutrinos coming from an inverse seesaw. In both cases our mean values lie only one order of magnitude below current upper limits, strengthening the case of searching for these decays in the quest for new physics.