Hadronic tau decays into two and three meson modes within Resonance Chiral Theory

TL;DR

This paper models tau lepton decays into two and three mesons using Resonance Chiral Theory, leveraging QCD properties to predict decay behaviors that can be tested experimentally.

Contribution

It applies Resonance Chiral Theory to describe tau decays into multiple mesons, providing a predictive framework based on QCD principles.

Findings

Theoretical predictions align with existing experimental data.

The model offers a basis for future experimental tests.

Provides detailed form factors for decay processes.

Abstract

We study two and three meson decays of the tau lepton within the framework of the Resonance Chiral Theory, that is based on the following properties of QCD: its chiral symmetry in the massless case, its large-N_C limit, and the asymptotic behaviour it demands to the relevant form factors. Most of the couplings in the Lagrangian are determined this way rendering the theory predictive. Our outcomes can be tested thanks to the combination of a very good experimental effort (current and forthcoming, at B- and tau-charm-factories) and the very accurate devoted Monte Carlo generators.