Sensitivity for four-body tau-lepton decays at Belle and Belle II experiments

I. Domínguez, P. S. Mares Damas, P. L. M. Podesta Lerma +1

We study the expected sensitivity at Belle and Belle II for four-body ${\tau }^{\mp }\to X^{\pm }{l}^{\mp }{l}^{\mp }{\nu }_{\tau }$ decays where $l=e$ or $\mu$ and $X=\pi$, $K$, $\rho$ and $K^{\ast }$ mesons. These decay…