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

TL;DR

This paper reports precise measurements of the branching fraction and $CP$ asymmetry in the decay of neutral B mesons to a specific three-body final state, using a large data sample from the Belle experiment.

Contribution

First measurement of the branching fraction and $CP$ asymmetry for $ar{B}^{0}(B^{0}) o K^{0}_{S}K^{ pm}\pi^{ pm}$ decays at Belle, including analysis of differential structures.

Findings

Branching fraction: (3.60 ± 0.33 ± 0.15)×10^{-6}

$CP$ asymmetry: (-8.5 ± 8.9 ± 0.2)%

Hints of peaking structures in Dalitz variables

Abstract

We report the measurement of the branching fraction and $CP$ asymmetry for the $\bar{B}^{0}(B^{0})\to K^{0}_{S}K^{\mp}\pi^{\pm}$ decay. The analysis is performed on a data sample of 711 $\rm{fb}^{-1}$ collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. We obtain a branching fraction of $(3.60\pm0.33\pm0.15)\times10^{-6}$ and an $\mathcal{A}_{CP}$ of $(-8.5\pm8.9\pm0.2)\%$, 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.