5. Theoretical Physics (CSN4)

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

by Dr Olga Shekhovtsova (Kharkov Inst. Physics and Technology)

Aula A1 (LNF)

Aula A1


Via Enrico Fermi, 40 00044 Frascati (Roma)
TAUOLA is a MC generator dedicated to generating tau-lepton decays and it is used in the analysis of experimental data both at B-factories and LHC. TAUOLA is a long term project that started in the 90's and has been under development up to now. Hadronic tau decays provide a clean laboratory to test the non-perturbative strong interaction involving mesons in rather clean conditions. In the last two years substantial progress in the simulation of the process: tau-> 3pions nu_tau has been achieved. It relies on a new parametrization of the corresponding hadronic current based on the Resonance Chiral Lagrangian and the recent availability of the unfolded distributions from BaBar analysis for all invariant hadronic masses. The choice of this channel was motivated by its relatively large branching ratio and the already non-trivial dynamics of three-pion final state. A set of the hadronic currents for other final states with 2 and 3 pseudoscalars is also installed in TAUOLA and the fitting procedure is under development.