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tau -> pi pi pi nu(tau) decays and the a(1)(1260) off-shell width revisited

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tau -> pi pi pi nu(tau) decays and the a(1)(1260) off-shell width revisited

dc.contributor.author	Gómez Dumm, Daniel
dc.contributor.author	Roig Garcés, Pablo
dc.contributor.author	Pich Zardoya, Antonio
dc.contributor.author	Portolés Ibáñez, Jorge
dc.date.accessioned	2015-02-27T11:43:08Z
dc.date.available	2015-02-27T11:43:08Z
dc.date.issued	2010
dc.identifier.uri	http://hdl.handle.net/10550/42509
dc.description.abstract	The tau -> pi pi pi nu_tau decay is driven by the hadronization of the axial-vector current. Within the resonance chiral theory, and considering the large-Nc expansion, this process has been studied in Ref.[1]. In the light of later developments we revise here this previous work by including a new off-shell width for the lightest a_1 resonance that provides a good description of the tau -> pi pi pi nu_tau spectrum and branching ratio. We also consider the role of the rho(1450) resonance in these observables. Thus we bring in an overall description of the tau -> pi pi pi nu_tau process in excellent agreement with our present experimental knowledge.
dc.language.iso	eng
dc.relation.ispartof	Physics Letters B, 2010, vol. 685, num. 2-3, p. 158-164
dc.source	Gómez Dumm, Daniel Roig Garcés, Pablo Pich Zardoya, Antonio Portolés Ibáñez, Jorge 2010 tau -> pi pi pi nu(tau) decays and the a(1)(1260) off-shell width revisited Physics Letters B 685 2-3 158 164
dc.subject	Física
dc.title	tau -> pi pi pi nu(tau) decays and the a(1)(1260) off-shell width revisited
dc.type	journal article	es_ES
dc.date.updated	2015-02-27T11:43:08Z
dc.identifier.doi	http://dx.doi.org/10.1016/j.physletb.2010.01.059
dc.identifier.idgrec	061490
dc.rights.accessRights	open access	es_ES