Analysis of tau -> Ks pion nu_tau Belle data in a chiral framework
arXiv:0810.0639 · doi:10.1016/j.nuclphysbps.2008.12.042
Abstract
The recent measurement of the tau -> Ks pion nu_tau spectrum by the Belle Collaboration provides the frame to set forth a theoretical description of the decay, which is based on the contributing vector F_+(s) and scalar F_0(s) form factors. We show that a good representation of data is obtained through the use of form factors calculated within resonance chiral theory and constrained by dispersion relations and short-distance QCD. Hence we obtain a determination of K*(892) parameters and the low-energy parameterization of F_+(s).
4 pages, 2 figures