Tau decays into two mesons: an overview
Department of Physics, Indiana University, Bloomington, IN 47405, USA Center for Exploration of Energy and Matter, Indiana University, Bloomington, IN 47408, USA
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Published online: 17 June 2019
We review the state-of-the-art theoretical analyses of tau decays into a pair of mesons and a neutrino. The participant vector and scalar form factors, f+ (s) and f0(s), are described in the frame of Chiral Perturbation Theory with resonances supplemented by dispersion relations, and the physical parameters of the intermediate resonances produced in the decay are extracted through the pole position of f+,0(s) in the complex plane. As a side result, we also determine the low-energy observables associated to the form factors. We hope our study to be of interest for present and future experimental analyses of these decays.
© The Authors, published by EDP Sciences, 2019
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