Sanz Cillero, Juan JoséShekhovtsova, Olga2023-06-182023-06-182017-12-141029-847910.1007/JHEP12(2017)080https://hdl.handle.net/20.500.14352/19391In this article we analyze the contribution from intermediate spin-0 and spin-2 resonances to the τ → νπππ decay by means of a chiral invariant Lagrangian incorporating these mesons. In particular, we study the corresponding axial-vector form-factors. The advantage of this procedure with respect to previous analyses is that it incorporates chiral (and isospin) invariance and, hence, the partial conservation of the axial-vector current. This ensures the recovery of the right low-energy limit, described by chiral perturbation theory, and the transversality of the current in the chiral limit at all energies. Furthermore, the meson form-factors are further improved by requiring appropriate QCD high-energy conditions. We end up with a brief discussion on its implementation in the Tauola Monte Carlo and the prospects for future analyses of Belle’s data.engAtribución 3.0 Españahttps://creativecommons.org/licenses/by/3.0/es/journal articlehttps://doi.org/10.1007/JHEP12%282017%29080open accessChiral LagrangiansEffective Field TheoriesFísica-Modelos matemáticosTeoría de los quanta2210.23 Teoría Cuántica