Study of two- and three-meson decay modes of tau-lepton with Monte Carlo generator TAUOLA

TL;DR

This paper reviews the modeling of two- and three-meson tau-lepton decays using the TAUOLA Monte Carlo generator, comparing theoretical predictions with experimental data from Belle and BaBar to enhance understanding of non-perturbative QCD.

Contribution

It presents the implementation of tau-lepton decay modes in TAUOLA and compares theoretical results with experimental data to validate the models.

Findings

Good agreement between TAUOLA predictions and Belle/BaBar data.

Enhanced understanding of tau decay dynamics and non-perturbative QCD.

Validation of decay mode simulations for future physics analyses.

Abstract

The study of the $\tau$-lepton decays into hadrons has contributed to a better understanding of non-perturbative QCD and light-quark meson spectroscopy, as well as to the search of new physics beyond the Standard Model. The two- and three-meson decay modes, considering only those permitted by the Standard Model, are the predominant decays and together with the one-pion mode compose more than $85\%$ of the hadronic $\tau$-lepton decay width. In this note we review the theoretical results for these modes implemented in the Monte Carlo event generator TAUOLA and present at the same time a comparison with the Belle Collaboration data for the two-pion decay mode and the BaBar preliminary data for the three-pion decay mode as well for the decay mode into two-kaon and one-pion.