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arXiv hep-ex/0403003hep-ex
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搜索衰变B0 -> ppbar

Search for the Decay B0 -> ppbar

BaBar Collaboration

摘要:

本文介绍了在SLAC PEP-Ⅱ非对称能量$B$工厂的BaBar探测器收集的8800万个Y(4S)-> BBbar衰变样品中寻找无粲二体重子衰变B^0 -> ppbar的结果。我们使用切伦科夫辐射干净地识别质子,并确定信号产量与最大似然拟合技术,使用运动学和拓扑信息。我们没有发现信号存在的证据,并将BF(B^0 -> ppbar)的90%置信水平上限设为< 2.7 x 10^-7。

英文摘要:

We present the result of a search for the charmless two-body baryonic decay B^0 -> ppbar in a sample of 88 million Y(4S) -> BBbar decays collected by the BaBar detector at the SLAC PEP-II asymmetric-energy $B$ Factory. We use Cherenkov radiation to identify protons cleanly, and determine the signal yield with a maximum-likelihood fit technique using kinematic and topological information. We find no evidence for a signal and place a 90% confidence-level upper limit of BF(B^0 -> ppbar) < 2.7 x 10^-7.

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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