Measurement of the branching fraction of $B^{+}\to \ddot{I}{„}^{+}\hat{I}{½}_{\ddot{I}}„$ decays with the semileptonic tagging method and the full Belle data sample

Abstract

We report a measurement of the branching fraction of $B^{+}\to \ddot{I}{„}^{+}\hat{I}{½}_{\ddot{I}}„$ decays using a data sample of $772\times 10^{6}B\bar{B}$ pairs, collected at the $\hat{I}\yen (4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider. We reconstruct the accompanying $B$ meson in a semileptonic decay and detect the $B^{+}\to \ddot{I}{„}^{+}\hat{I}{½}_{\ddot{I}}„$ candidate in the recoiling event. We obtain a branching fraction of $\mathcal{B}(B^{+}\to \ddot{I}{„}^{+}\hat{I}{½}_{\ddot{I}}„)=[1.25\pm 0.28(stat.)\pm 0.27(syst.)]\times 10^{-4}$. This result is in good agreement with previous measurements and the expectation from calculations based on the Standard Model.

Belle conference paper for the International Workshop on the CKM Unitarity Triangle (CKM 2014)