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arXiv 0903.0850hep-ex
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单个顶夸克产生的观测

Observation of Single Top-Quark Production

The D0 Collaboration, V. M. Abazov

摘要:

我们利用费米实验室Tevatron对撞机D 0探测器收集的2.3 fb^-1数据,观测到了在sqrt(s)= 1.96 TeV的ppbar碰撞中单顶夸克的电弱产生。使用包含孤立电子或μ子和缺失横向能量的事件,以及源自b夸克碎裂的喷流,我们测量了σ(ppbar -> tb + X,tqb + X)= 3.94 +- 0.88 pb的截面。在没有信号的情况下,在该值或更高值下测量截面的概率为2.5 x 10^-7,对应于观察值的5.0标准差显著性。

英文摘要:

We report observation of the electroweak production of single top quarks in ppbar collisions at sqrt(s) = 1.96 TeV based on 2.3 fb^-1 of data collected by the D0 detector at the Fermilab Tevatron Collider. Using events containing an isolated electron or muon and missing transverse energy, together with jets originating from the fragmentation of b quarks, we measure a cross section of sigma(ppbar -> tb + X, tqb + X) = 3.94 +- 0.88 pb. The probability to measure a cross section at this value or higher in the absence of signal is 2.5 x 10^-7, corresponding to a 5.0 standard deviation significance for the observation.

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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