Analysis of tau -> Ks pion nutau Belle data in a chiral framework
Abstract
The recent measurement of the tau -> Ks pion nutau 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 F0(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).
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