MC generator TAUOLA: implementation of Resonance Chiral Theory for two and three meson modes. Comparison with experiment

TL;DR

This paper updates the TAUOLA Monte Carlo generator to include two- and three-meson decay modes of the tau lepton based on Resonance Chiral Theory, improving modeling accuracy for these dominant decay channels.

Contribution

It implements Resonance Chiral Theory into TAUOLA for two- and three-meson tau decays, providing a more theoretically grounded simulation approach.

Findings

Model parameters fitted to BaBar data for three-pion decay.

Enhanced simulation of tau decay modes accounting for 88% of hadronic width.

Initial validation shows promising agreement with experimental data.

Abstract

We present a partial upgrade of the Monte Carlo event generator TAUOLA with the two and three hadron decay modes using the theoretical models based on Resonance Chiral Theory. These modes account for 88% of total hadronic width of the tau meson. First results of the model parameters have been obtained using BaBar data for three pion mode.