Measurement of $B^{+}\to {\tau }^{+}{\nu }_{\tau }$ branching fraction with a hadronic tagging method at Belle II

Belle II Collaboration, I. Adachi, K. Adamczyk +341

We present a measurement of the branching fraction of $B^{+}\to {\tau }^{+}{\nu }_{\tau }$ decays using $(387\pm 6)\times 10^6$ ${\rm Y}(4S)$ collected between 2019 and 2022 with the Belle II detector at the S…