Measurement of the $\tau$-lepton mass with the Belle~II experiment

Belle II Collaboration, I. Adachi, K. Adamczyk +418

We present a measurement of the $\tau$-lepton mass using a sample of about 175 million $e^{+}{e}^{-}\to {\tau }^{+}{\tau }^{-}$ events collected with the Belle II detector at the SuperKEKB $e^{+}{e}^{-}$ collid…