Measurement of branching fraction and final-state asymmetry for the ${\bar{B}}^0\to K_S^0{K}^{\mp }\ddot{I}{€}^{\pm }$ decay

Abstract

We report a measurement of the branching fraction and final-state asymmetry for the ${\bar{B}}^0\to K_S^0{K}^{\mp }\ddot{I}{€}^{\pm }$ decays. The analysis is based on a data sample of 711 ${\mathrm{fb}}^{-1}$ collected at the $\hat{I}\yen (4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider. We obtain a branching fraction of $(3.60\pm 0.33\pm 0.15)\times 10^{-6}$ and a final-state asymmetry of $(-8.5\pm 8.9\pm 0.2)\%$, where the first uncertainties are statistical and the second are systematic. Hints of peaking structures are seen in the differential branching fractions measured as functions of Dalitz variables.

17 pages, 4 figures, to be submitted to PRD(RC)