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Measurements of branching fraction and direct C\!P asymmetry in B^(pm)to K⁰_(S)K⁰_(S)K^(pm) and a search for B^(pm)to K⁰_(S)K⁰_(S)π^(pm)
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arxiv 1812.10221 v1 pith:NUGVQSAH submitted 2018-12-26 hep-ex
Measurements of branching fraction and direct C\!P asymmetry in B^(pm)to K⁰_(S)K⁰_(S)K^(pm) and a search for B^(pm)to K⁰_(S)K⁰_(S)π^(pm)
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We study charmless hadronic decays of charged $B$ mesons to the final states $K^{0}_{S}K^{0}_{S}K^{\pm}$ and $K^{0}_{S}K^{0}_{S}\pi^{\pm}$ using a $711 fb^{-1}$ data sample that contains $772\times 10^6$ $B\bar{B}$ pairs, and was collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. For $B^{\pm}\to K^{0}_{S}K^{0}_{S}K^{\pm}$, the measured branching fraction and direct $CP$ asymmetry are $[10.42\pm0.43(stat)\pm 0.22(syst)]\times10^{-6}$ and [$+1.6\pm3.9(stat)\pm 0.9(syst)$]%, respectively. In the absence of a statistically significant signal for $B^{\pm}\to K^{0}_{S}K^{0}_{S}\pi^{\pm}$, we obtain a 90% confidence-level upper limit on its branching fraction as $8.7 \times10^{-7}$.
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