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Resonance Effective Theory Approach to τ --> 3πντ Decays

AuthorsGómez Dumm, D.; Pich, Antonio ; Portolés, Jorge
KeywordsLepton decay
Tau leptons
Pion production
Quantum chromodynamics
Issue Date2-Dec-2004
PublisherAmerican Institute of Physics
CitationAip Conference Proceedings 739(1): 660-662 (2004)
AbstractThe decays τ --> 3πντ are analyzed in the framework of the resonance effective theory of QCD, We derive the effective chiral Lagrangian relevant for the evaluation of the hadronic axial-vector current, taking into account the constraints imposed by QCD on the high energy asymptotic behaviour. Then we fit the unknown parameters to the spectral function and branching ratio measured by ALEPH, showing that the theory is in good agreement with experimental data. A detailed description of the work sketched here can be found in Ref. [1].
Description3 páginas.-- Comunicación presentada en el IX Hadron Physics and VII Relativistic Aspects of Nuclear Physics: A Joint Meeting on QCD and QCP celebrado del 28 de Marzo al 3 de Abril de 2004 en Rio de JAneiro (Brasil).
Publisher version (URL)http://dx.doi.org/10.1063/1.1843685
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