tau ->pi pi pi nu(tau) decays in the resonance effective theory
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tau ->pi pi pi nu(tau) decays in the resonance effective theory

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tau ->pi pi pi nu(tau) decays in the resonance effective theory

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dc.contributor.author Gómez Dumm, Daniel
dc.contributor.author Pich Zardoya, Antonio
dc.contributor.author Portolés Ibáñez, Jorge
dc.date.accessioned 2015-02-27T08:48:34Z
dc.date.available 2015-02-27T08:48:34Z
dc.date.issued 2004
dc.identifier.uri http://hdl.handle.net/10550/42485
dc.description.abstract tau-->pipipinu(tau) decays are analyzed within the framework of the resonance effective theory of QCD. We work out the relevant Lagrangian that describes the axial-vector current hadronization contributing to these processes, in particular the local a(1)(1260)-rho(770)-Goldstone interactions. The new coupling constants are constrained by imposing the asymptotic behavior of the corresponding spectral function within QCD. Hence we compare the theoretical framework with the experimental data, obtaining a good quality fit from the ALEPH spectral function and branching ratio. We also get values for the mass and on-shell width of the a(1)(1260) resonance. In this way we are able to provide the structure functions that have been measured by OPAL and CLEO-II and we find an excellent agreement.
dc.language.iso eng
dc.relation.ispartof Physical Review D, 2004, vol. 69, num. 7, p. 073002-1-073002-13
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Gómez Dumm, Daniel Pich Zardoya, Antonio Portolés Ibáñez, Jorge 2004 tau ->pi pi pi nu(tau) decays in the resonance effective theory Physical Review D 69 7 073002-1 073002-13
dc.subject Física
dc.title tau ->pi pi pi nu(tau) decays in the resonance effective theory
dc.type info:eu-repo/semantics/article
dc.date.updated 2015-02-27T08:48:35Z
dc.identifier.doi http://dx.doi.org/10.1103/PhysRevD.69.073002
dc.identifier.idgrec 016633

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