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arXiv 0708.0376hep-ex
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B ~+ --> K ~+K-pi ~+衰变的观察

Observation of the Decay B+ --> K+K-pi+

The BABAR Collaboration, B. Aubert

摘要:

本文报道了荷电B介子到末态K ~+K-pi ~+的无粲强子衰变的观测结果。使用BABAR探测器在Y(4S)共振时收集的347.5 fb^-1数据样本,我们观察到429+/-43个信号事件,显著性为9.6 sigma。我们测量包含分支分数BF(B+ --> K+K-pi+)= [5.0+/-0.5(stat)+/-0.5(syst)]x10^-6。对候选信号的达利茨图的观察显示,在K+K不变质量分布中,在1.5 GeV/c^2附近有一个宽的峰值结构。我们发现直接CP不对称性与零一致。

英文摘要:

We report the observation of charmless hadronic decays of charged B mesons to the final state K+K-pi+. Using a data sample of 347.5 fb^-1 collected at the Y(4S) resonance with the BABAR detector, we observe 429+/-43 signal events with a significance of 9.6 sigma. We measure the inclusive branching fraction BF(B+ --> K+K-pi+) = [5.0+/-0.5(stat)+/-0.5(syst)]x10^-6. Inspection of the Dalitz plot of signal candidates shows a broad structure peaking near 1.5 GeV/c^2 in the K+K- invariant mass distribution. We find the direct CP asymmetry to be consistent with zero.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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