tau Decays to Five Mesons in TAUOLA
Johann H. Kuhn, Z. Was

TL;DR
This paper extends the TAUOLA library to include five-meson tau decays with realistic decay amplitudes, enabling more precise modeling of tau decay processes in high-energy physics.
Contribution
It introduces a new implementation of five-meson tau decay modes into TAUOLA with simplified resonance models and phase-space generation, improving its accuracy for current experimental data.
Findings
Monte Carlo and analytical results are in agreement for the new decay modes.
The model provides a first realistic example for five-pion decay amplitudes.
Phase-space generation includes resonance presampling, suitable for physics applications.
Abstract
The tau-decay library TAUOLA has gained popularity over the last decade. However, with the continuously increasing precision of the data, some of its functionality has become insufficient. One of the requirements is the implementation of decays into five mesons plus a neutrino with a realistic decay amplitude. This note describes a step into this direction. For the 2pi- pi+ 2pi0 mode the three decay chains tau- --> a_1- nu --> rho- (--> pi- pi0) omega (--> pi- pi+ pi0) nu, tau- --> a_1- nu --> a_1- (--> 2pi- pi+) f_0 (--> 2pi0) nu, and tau- --> a_1- nu --> a_1- (--> pi- 2pi0) f_0 (--> pi + pi-) nu are introduced with simple assumptions about the couplings and propagators of the various resonances. Similar amplitudes (without the rho omega contributions) are adopted for the pi- 4pi0 and 3pi- 2pi+ modes. The five-pion amplitude is thus based on a simple model, which, however, can be…
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · Neutrino Physics Research
