Measurements of branching fraction and $CP$ asymmetry of the ${\bar{B}}^0(B^0)\to K_S^0{K}^{\mp }{\pi }^{\pm }$ decay at Belle

We report the measurement of the branching fraction and $CP$ asymmetry for the ${\bar{B}}^0(B^0)\to K_S^0{K}^{\mp }{\pi }^{\pm }$ decay. The analysis is performed on a data sample of 711 ${\mathrm{f}\mathrm{b}}^{-1}$ collected at the $\mathrm{{\rm Y}}(4S)$ 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 an ${\mathcal{A}}_{CP}$ of $(-8.5\pm 8.9\pm 0.2)\mathrm{\%}$, where the first uncertainties are statistical and the second are systematic. Hints of peaking structures are also observed in the differential branching fraction as functions of Dalitz variables.