Study of $B^{+}\to \hat{I}{¼}^{+}\hat{I}{½}_{\hat{I}}¼$ decays at Belle and Belle II

Belle, Belle II Collaborations, : +412

We report a measurement of the branching fraction for the leptonic decay $B^{+}\to \hat{I}{¼}^{+}\hat{I}{½}_{\hat{I}}¼$. This work presents the first $B^{+}\to \hat{I}{¼}^{+}\hat{I}{½}_{\hat{I}}¼$ result using Belle~II data, an updated Be…