Dresden 2013 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 24: Quantenfeldtheorie 2
T 24.4: Vortrag
Mittwoch, 6. März 2013, 17:30–17:45, WIL-C129
Hadronic decays of tau-leptons in the extended Nambu – Jona-Lasinio model — •Dmitriy Kostunin1, Mikhail Volkov2, and Andrey Arbuzov2 — 1Institut für Kernphysik, Karlsruhe Institute of Technology (KIT) — 2Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research (JINR), Dubna, Russia
Modern experiments have collected large statistics on tau-lepton decays and electron-positron annihilation into light hadrons. Therefore it is worthwhile to confront the experimental results with the corresponding theoretical predictions. The extended Nambu – Jona-Lasinio model is a good candidate for the theoretical description of these processes. Excited states of mesons in this version of the NJL model are described with the help of polynomial form-factors with minimal number of parameters. We worked out decays and cross-sections with ππ, ππ(1300), ωπ, ηπ, η′π, ηππ, η′ππ final states. Our calculations are in satisfactory agreement with the existing experimental results. Predictions for branching ratios of suppressed decays were obtained and compared with previous theoretical estimates.