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arXiv 0806.4467hep-ex
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搜索B0 -> K*+ K*-

Search for B0 -> K*+ K*-

The BABAR Collaboration, B. Aubert

摘要:

我们报告了在斯坦福直线加速器中心的PEP-II非对称能量e+e对撞机上用BaBar探测器收集的4.54亿+/- 5百万个BBbar对样本搜索衰变B 0-> K*+ K*-的结果。假设衰变是完全纵向极化的,我们得到了Br(B 0-> K*+ K*-)< 2.0 x 10^{-6}的分支分数在90%置信水平的上限。

英文摘要:

We report the results of a search for the decay B0 -> K*+ K*- with a sample of 454 +/- 5 million BBbar pairs collected with the BaBar detector at the PEP-II asymmetric-energy e+e- collider at the Stanford Linear Accelerator Center. We obtain an upper limit at the 90% confidence level on the branching fraction for Br(B0 -> K*+ K*-) < 2.0 x 10^{-6}, assuming the decay is fully longitudinally polarized.

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