Study of the tau meson decay modes with Monte Carlo generator TAUOLA. Status and perspectives

TL;DR

This paper discusses recent advancements in simulating tau lepton decay modes using the TAUOLA Monte Carlo generator, incorporating new hadronic current parametrizations based on Resonance Chiral Lagrangian and experimental data from BaBar and Belle.

Contribution

It introduces updated hadronic current models for tau decays in TAUOLA, fitted to recent experimental data, enhancing simulation accuracy for various decay channels.

Findings

Improved fit of the $ au^- o ext{3 pions} u_ au$ decay mode to BaBar data.

Implementation of hadronic currents for other decay modes like $K^+K^- ext{pi}^-$ and $ ext{pi}^0 ext{pi}^-$.

Preliminary results showing better agreement with experimental distributions.

Abstract

In the last two years substantial progress for the simulation of the process: $\tau^- \to \pi^-\pi^+\pi^- \nu_\tau$ by the Monte Carlo generator TAUOLA was achieved. It is related to a new parametrization of the corresponding hadronic current based on the Resonance Chiral Lagrangian and the recent availability of the unfolded distributions from the BaBar Collaboration analysis for all invariant hadronic masses. The theoretical model parameters were fitted to the one-dimensional distributions provided by the BaBar Collaboration and results of the fit are discussed. A set of the hadronic currents for other final states with two and three pseudoscalars is also installed in TAUOLA and the preliminary results for fitting $K^+K^-\pi^-$ and $\pi^0\pi^-$ to BaBar and Belle data are presented.