Hadronic decays of the tau lepton: tau -> (3 pion) nu_tau within Resonance Chiral Theory

Details Hadronic decays of the tau lepton: tau -> (3 pion) nu_tau within Resonance Chiral Theory Hadronic decays of the tau lepton: tau -> (3 pion) nu_tau within Resonance Chiral Theory

2005-09-27

arxiv.org/abs/hep-ph/0509301v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 4 figures. Talk given at the International Workshop on Quantum Chromodynamics and Experiment (QCD@Work 2005), Convers

Scientific paper

Tau decays into hadrons foresee the study of the hadronization of vector and axial-vector QCD currents, yielding relevant information on the dynamics of the resonances entering into the processes. We analyse tau -> (3 pion) nu_tau decays within the framework of the Resonance Chiral Theory, comparing this theoretical scheme with the experimental data, namely ALEPH spectral function and branching ratio. Hence we get values for the mass and on-shell width of the a_1(1260) resonance, and provide the structure functions that have been measured by OPAL and CLEO-II.

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