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arXiv 0706.3790hep-ex
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全强子衰变模式下sqrt{s}=1.96 TeV处p反p到t反t产生截面和顶夸克质量的测量

Measurement of the p anti-p to t anti-t Production Cross Section and the Top Quark Mass at sqrt{s}=1.96 TeV in the All-Hadronic Decay Mode

CDF Collaboration, T. Aaltonen

摘要:

我们报告了用费米实验室Tevatron的CDFII探测器收集的1.02 fb^-1的p反p数据测量t反t产生截面和顶夸克质量的结果。我们选择事件与六个或更多的喷气机上施加了一些运动学的要求,通过神经网络算法。这些喷流中至少有一个必须通过重建次级顶点来确定是由b夸克候选者发起的。测得的截面为sigma_{tt} =8.3+-1.0(stat.)+ 2.0-1.5(系统)+- 0.5(流明)pb,这与标准模型预测一致。顶夸克质量为174.0+-2.2(统计)+- 4.8(系统)GeV/c^2是从似然拟合中推导出来的,其中包含了代表信号和背景的重建质量分布。

英文摘要:

We report the measurements of the t anti-t production cross section and of the top quark mass using 1.02 fb^-1 of p anti-p data collected with the CDFII detector at the Fermilab Tevatron. We select events with six or more jets on which a number of kinematical requirements are imposed by means of a neural network algorithm. At least one of these jets must be identified as initiated by a b-quark candidate by the reconstruction of a secondary vertex. The cross section is measured to be sigma_{tt}=8.3+-1.0(stat.)+2.0-1.5(syst.)+-0.5(lumi.) pb, which is consistent with the standard model prediction. The top quark mass of 174.0+-2.2(stat.)+-4.8(syst.) GeV/c^2 is derived from a likelihood fit incorporating reconstructed mass distributions representative of signal and background.

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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