Measurement of Branching Fractions for $B\to \hat{I}{\cdot }_c{K}^{(\ast )}$ Decays

Abstract

We report measurements of branching fractions for charged and neutral $B\to \hat{I}{\cdot }_{c}K$ decays where the $\hat{I}{\cdot }_c$ meson is reconstructed in the $K_S^0{K}^{\pm }\ddot{I}{€}^{\mp },K^{+}{K}^{-}\ddot{I}{€}^0,K^{\ast 0}{K}^{-}\ddot{I}{€}^{+}$ and $p\bar{p}$ decay channels. The neutral $B^0$ channel is a CP eigenstate and can be used to measure the CP violation parameter $\sin 2\ddot{I}{•}_1$. We also report the first observation of the $B^0\to \hat{I}{\cdot }_c{K}^{\ast 0}$ mode. The results are based on an analysis of 29.1 fb${}^{-1}$ of data collected by the Belle detector at KEKB.

To appear in Physical Review Letters