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T: Fachverband Teilchenphysik

T 11: QCD (Theorie) 1

T 11.1: Talk

Monday, March 9, 2009, 17:00–17:15, M109

A framework improving the hadronization of QCD currents in TAUOLA and PHOKHARA — •Pablo Roig — IFIC - Instituto de Física Corpuscular: Centro mixto UVEG/CSIC. Edificio Institutos de Investigación. Apartado de Correos 22085 E-46071 Valencia - España — Physikdepartment T30f, Technische Universitaet Muenchen, D-85747 Garching, Germany

We present our study of the hadronization structure of QCD currents leading to decays τ → π π ν_τ, τ→ K πν_τ, τ → 3 πν_τ and τ → KKπν_τ. The pillars of our framework are the N_C→∞ limit of Large N_C QCD, the chiral structure exhibited at low energies and the asymptotic behaviour of the associated form factors. The couplings of the theory are mostly constrained by the aforementioned procedure and we are able to provide a good phenomenological description of the processes under consideration. Our study is mandatory in order to analyse the data provided by B-factories (Babar, Belle), that are obtaining huge samples of excellent quality, the tau-charm factory BES-III and a foreseen super-B factory.