Predictions on the second-class current decays ${\tau }^{-}\to {\pi }^{-}{\eta }^{(\prime )}{\nu }_{\tau }$

Rafel Escribano, Sergi Gonzalez-Solis, Pablo Roig

We analyze the second-class current decays ${\tau }^{-}\to {\pi }^{-}{\eta }^{(\prime )}{\nu }_{\tau }$ in the framework of Chiral Perturbation Theory with resonances. Taking into account ${\pi }^0$-$\eta$-$η^{\prime…