%0 Journal Article
%T tau -> pi pi pi nu(tau) decays and the a(1)(1260) off-shell width revisited
%A Gomez Dumm, D.
%A Roig, P.
%A Pich, A.
%A Portoles, J.
%J Physics Letters B
%D 2010
%V 685
%N 2-3
%I Elsevier Science Bv
%@ 0370-2693
%G English
%F GomezDumm_etal2010
%O ISI:000275148800010
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=488), last updated on Thu, 01 Nov 2012 20:03:46 +0000
%X 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-N-C expansion, this process has been studied in Ref. [1] (D. Gomez Dumm, A. Pich, J. Portoles, 2004). 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.
%K Hadron tau decays
%K Chiral Lagrangians
%K QCD
%K 1/N expansion
%R 10.1016/j.physletb.2010.01.059
%U http://lanl.arxiv.org/abs/0911.4436
%U https://doi.org/10.1016/j.physletb.2010.01.059
%P 158-164