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arXiv 1012.2466hep-ex
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sqrt(s)=7 TeV pp碰撞中包含W和Z截面的测量

Measurements of Inclusive W and Z Cross Sections in pp Collisions at sqrt(s)=7 TeV

CMS Collaboration

摘要:

本文根据LHC上CMS探测器记录的2.9皮电子数的数据,给出了sqrt(s)=7 TeV pp碰撞中包含W和Z玻色子产生截面的测量结果。在电子和μ子衰变通道中进行的测量结合起来,得到σ(pp到WX)乘以B(W到μ子或电子+中微子)= 9.95 \pm 0.07(统计)。\pm 0.28(系统)\pm 1.09(流明)nb和sigma(pp到ZX)乘以B(Z到带相反电荷的μ子或电子对)= 0.931 \pm 0.026(统计)\pm 0.023(系统)\pm 0.102(流明)NB.用最近的部分子分布函数在QCD中的次-主导阶计算的理论预言与测量的截面一致。比率的截面,其中招致实验系统的不确定性小于4%,也有报道。

英文摘要:

Measurements of inclusive W and Z boson production cross sections in pp collisions at sqrt(s)=7 TeV are presented, based on 2.9 inverse picobarns of data recorded by the CMS detector at the LHC. The measurements, performed in the electron and muon decay channels, are combined to give sigma(pp to WX) times B(W to muon or electron + neutrino) = 9.95 \pm 0.07(stat.) \pm 0.28(syst.) \pm 1.09(lumi.) nb and sigma(pp to ZX) times B(Z to oppositely charged muon or electron pairs) = 0.931 \pm 0.026(stat.) \pm 0.023(syst.) \pm 0.102(lumi.) nb. Theoretical predictions, calculated at the next-to-next-to-leading order in QCD using recent parton distribution functions, are in agreement with the measured cross sections. Ratios of cross sections, which incur an experimental systematic uncertainty of less than 4%, are also reported.

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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