Resonance Chiral Lagrangians and alternative approaches to hadronic tau decays

TL;DR

This paper reviews recent theoretical advances in modeling hadronic tau decays, focusing on resonance chiral Lagrangians and their comparison to experimental data to understand non-perturbative QCD effects.

Contribution

It introduces recent theoretical developments using resonance chiral Lagrangians to analyze hadronic tau decays and compares these models with experimental data.

Findings

Resonance chiral Lagrangians effectively describe di-pion tau decays.

Theoretical models show good agreement with experimental data.

Insights into non-perturbative QCD dynamics from tau decay analysis.

Abstract

Exclusive semi-leptonic decays of the tau lepton offer a clean probe to study the hadronization of QCD currents in its non-perturbative regime and learn about resonance dynamics, which drives strong interactions in these processes. In this theory outlook, I will use the simplest non-trivial di-pion tau decays to illustrate briefly recent theoretical progress on these analyses and their comparison to data.