Analysis of BaBar data for three meson tau decay modes using the Tauola generator

The hadronic current for the $\tau^- \to \pi^-\pi^+\pi^-\nu_\tau$ decay calculated in the framework of the Resonance Chiral Theory with an additional modification to include the $\sigma$ meson is described. Implementation into the Monte Carlo generator Tauola and fitting strategy to get the model parameters using the one-dimensional distributions are discussed. The results of the fit to one-dimensional mass invariant spectrum of the BaBar data are presented.Comment: 5 pages, 1 figure. Proceedings of the 7th Edition of the International Workshop on Quantum Chromodynamics -QCD@Work: Interantional Workshop on QCD, Theory and Experiment- (16-19 June 2014, Giovinazzo, Italy

Three pseudoscalar meson production in e+e−e^+ e^- annihilation

We study, at leading order in the large number of colours expansion and within the Resonance Chiral Theory framework, the odd-intrinsic-parity $e^+ e^- \rightarrow \pi^+ \pi^- (\pi^0, \eta)$ cross-sections in the energy regime populated by hadron resonances, namely 3 \, m_{\pi} \lsim E \lsim 2 \, \mbox{GeV}. In addition we implement our results in the Monte Carlo generator PHOKHARA 7.0 and we simulate hadron production through the radiative return method.Comment: 39 pages, 5 figure