Hadronic tau decays into two and three meson modes within Resonance Chiral Theory

Abstract

We study two and three meson decays of the tau lepton within the framework of the Resonance Chiral Theory, that is based on the following properties of QCD: its chiral symmetry in the massless case, its large-N_C limit, and the asymptotic behaviour it demands to the relevant form factors. Most of the couplings in the Lagrangian are determined this way rendering the theory predictive. Our outcomes can be tested thanks to the combination of a very good experimental effort (current and forthcoming, at B- and tau-charm-factories) and the very accurate devoted Monte Carlo generators.

6 pages, no figures. Talk given at the Young Researchers Workshop: "Physics Challenges in the LHC Era" held in Frascati, May 11 and 14, 2009. Published in the Proceedings of the Workshop in the Frascati Physics Series