Search for lepton-flavor-violating ${\tau }^{-}\to {\ell }^{-}\varphi$ decays in 2019-2021 Belle II data

Belle II Collaboration, F. Abudinén, I. Adachi +575

We report a search for lepton-flavor-violating decays ${\tau }^{-}\to {\ell }^{-}\varphi$ (${\ell }^{-}=e^{-},{\mu }^{-}$) at the Belle II experiment, using a sample of electron-positron data produced at the Su…