Study of charmless decays B^±→ K^0_S K^0_S h^± (h=K,π) at Belle
arXiv: High Energy Physics - Experiment(2018)
摘要
We report a search for charmless hadronic decays of charged B mesons to the final states K^0_S K^0_S K^± and K^0_S K^0_Sπ^± . The results are based on a 711 fb^-1 data sample that contains 772 × 10^6 B B̅ pairs, and was collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^+e^- collider. For B^±→ K^0_S K^0_S K^± decays, the measured branching fraction and direct CP asymmetry are [10.64±0.49(stat)± 0.44(syst)]×10^-6 and [-0.6±3.9(stat)± 3.4(syst)] respectively. In the absence of a statistically significant signal for B^±→ K^0_S K^0_Sπ^±, we set the 90 upper limit on its branching fraction at 1.14 × 10^-6.
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关键词
charmless decays
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