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arXiv 1011.0164hep-ex
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7 TeV与LHC的ATLAS实验pp碰撞中W和Z的产生

W and Z Production in pp Collisions at 7 TeV with the ATLAS Experiment at the LHC

V. Martinez Outschoorn

摘要:

本文介绍了利用大型强子对撞机(LHC)的ATLAS实验数据,在E_CM = 7 TeV质子-质子碰撞中观察到的W和Z玻色子以及产生截面的测量结果。结果基于118 W -> lnu和125 Z/gamma* -> ll(l=e,mu)候选事件,分别对应于约17 nb^-1和225 nb^-1的积分亮度。sigma_W x BR的测量值(W -> lnu)= 9.3 \pm 0.9(stat)\pm 0.6(系统)\pm 1.0(光)nb和sigma_Z/gamma* x BR(Z/γ * -> 11,66<m_ll<116)= 0.83 \pm 0.07(统计学)\pm 0.06(系统)\pm 0.09(亮度)nb.测量的W轻子电荷不对称性也报告。与基于NNLO QCD计算的理论预测的比较表明,与测量一致。

英文摘要:

The observation of W and Z bosons and a measurement of the production cross sections in proton proton collisions at E_CM = 7 TeV are presented using data from the ATLAS experiment at the LHC. Results are based on 118 W -> lnu and 125 Z/gamma* -> ll (l=e,mu) candidate events corresponding to an integrated luminosity of about 17 nb^-1 and 225 nb^-1 respectively. The measured values of sigma_W x BR(W -> lnu) = 9.3 \pm 0.9 (stat) \pm 0.6 (syst) \pm 1.0 (lumi) nb and sigma_Z/gamma* x BR(Z/gamma* -> ll, 66<m_ll<116) = 0.83 \pm 0.07 (stat) \pm 0.06 (syst) \pm 0.09 (lumi) nb. A measurement of the W lepton charge asymmetry is also reported. A comparison with theoretical predictions based on NNLO QCD calculations shows agreement with the measurements.

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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