Search for lepton flavor-violating decay modes $B^0\to K_S^0{\tau }^{\pm }{\ell }^{\mp }(\ell =\mu ,e)$ with hadronic $B$-tagging at Belle and Belle II

Belle, Belle II Collaborations, : +425

We present the first search for the lepton flavor-violating decay modes $B^0\to K_S^0{\tau }^{\pm }{\ell }^{\mp }(\ell =\mu ,e)$ using the 711 fb${}^{-1}$ and 365 fb${}^{-1}$ data samples re…