Model-independent Analysis of Lepton Flavour Violating Tau Decays

TL;DR

This paper provides a model-independent analysis of tau lepton decays into three charged leptons, using effective field theory to classify operators and predict decay distributions, aiding future experimental searches.

Contribution

It introduces a generic, model-independent framework for analyzing lepton-flavour violating tau decays based on effective-field-theory methods and operator classification.

Findings

Decay distributions derived for various operator structures

Phenomenological implications discussed for upcoming experiments

Framework applicable to a wide range of beyond Standard Model theories

Abstract

Many models for physics beyond the Standard Model predict lepton-flavour violating decays of charged leptons at a level which may become observable very soon. In the present paper we investigate the decays of a Tau into three charged leptons in a generic way, based on effective-field-theory methods, where the relevant operators are classified according to their chirality structure. We work out the decay distributions and discuss phenomenological implications.