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Hadron structure in tau -> KK pi nu(tau) decays

AutorPich, Antonio ; Portolés, Jorge ; Roig, Pablo ; Gómez Dumm, D.
Palabras claveHadron tau decays
Chiral Lagrangians
1/N Expansion
QCD
Fecha de publicación1-feb-2010
EditorAmerican Physical Society
CitaciónPhysical Review - Section D - Particles and Fields 81 (3): 034031(2010)
ResumenWe analyze the hadronization structure of both vector and axial-vector currents leading to tau -> KK pi nu(tau) decays. At leading order in the 1/N-C expansion, and considering only the contribution of the lightest resonances, we work out, within the framework of the resonance chiral Lagrangian, the structure of the local vertices involved in those processes. The couplings in the resonance theory are constrained by imposing the asymptotic behavior of vector and axial-vector spectral functions ruled by QCD. In this way we predict the hadron spectra and conclude that, contrary to previous assertions, the vector contribution dominates by far over the axial-vector one in all KK pi charge channels.
Versión del editorhttp://dx.doi.org/ 10.1103/PhysRevD.81.034031
URIhttp://hdl.handle.net/10261/23197
DOI10.1103/PhysRevD.81.034031
ISSN1550-7998
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