Study of Charmless Decays $$B^{\pm } \rightarrow K^0_{\scriptscriptstyle S} K^0_{\scriptscriptstyle S} h^{\pm } $$ ($$h=K,\pi $$) at Belle

We report a search for charmless hadronic decays of charged B mesons to the final states \(K^0_{\scriptscriptstyle S} K^0_{\scriptscriptstyle S} K^{\pm } \) and \(K^0_{\scriptscriptstyle S} K^0_{\scriptscriptstyle S} \pi ^{\pm } \). The results are based on a \(711\mathrm {\,fb}^{-1} \) data sample that contains \(772\times 10^6\) \(B\overline{B}{} \) pairs, and was collected at the \(\Upsilon {(4S)} \) resonance with the Belle detector at the KEKB asymmetric-energy \(e^+e^-\) collider. For \(B^{\pm } \rightarrow K^0_{\scriptscriptstyle S} K^0_{\scriptscriptstyle S} K^{\pm } \) decays, the measured branching fraction and direct \(C\!P \) asymmetry are \([10.42 \pm 0.43\mathrm {(stat)} \pm 0.22\mathrm {(syst)} ]\times 10^{-6}\) and [\(+1.6\pm 3.9\mathrm {(stat)} \pm 0.9\mathrm {(syst)} \)]%, respectively. In the absence of a statistically significant signal for \(B^{\pm }\rightarrow K^0_{\scriptscriptstyle S} K^0_{\scriptscriptstyle S} \pi ^{\pm } \), we set the 90% confidence level upper limit on its branching fraction at \(8.7 \times 10^{-7}\).