Michel parameters in radiative muon decay

TL;DR

This paper presents a model-independent analysis of radiative muon and tau decays using generalized Michel parameters, accounting for lepton mass effects, to aid experimental investigations.

Contribution

It introduces a comprehensive framework with exact mass dependence for analyzing radiative lepton decays using generalized Michel parameters.

Findings

Provides explicit formulas for decay distributions with mass effects

Facilitates interpretation of experimental data on muon and tau decays

Enhances theoretical tools for testing lepton flavor physics

Abstract

Radiative muon and tau lepton decays are described within the model-independent approach with the help of generalized Michel parameters. The exact dependence on charged lepton masses is taken into account. The results are relevant for modern and future experiments on muon and tau lepton decays.