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arXiv 1109.2576hep-ex
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用ATLAS探测器测量7次TeV pp碰撞的WW截面

Measurement of the WW Cross Section in 7 TeV pp Collisions with the ATLAS Detector

Haijun Yang

摘要:

我们报告的WW生产截面在pp碰撞在7 TeV的测量。利用2011年欧洲核子研究中心大型强子对撞机ATLAS探测器收集的积分亮度为1.02 /fb的数据分析了WW轻子衰变通道。利用414个观测到的WW候选事件和170个$\pm$ 28事件的估计背景,测量的WW产生截面为$48.2 \pm 4.0 {\rm(stat)} \pm 6.4 {\rm(syst)} \pm 1.8 {\rm(lumi)}$ pb,与标准模型NLO预测的46个$\pm$ 3 pb一致。

英文摘要:

We report a measurement of the WW production cross section in pp collisions at 7 TeV. The WW leptonic decay channels are analyzed using data corresponding to 1.02 /fb of integrated luminosity collected by the ATLAS detector during 2011 at the CERN Large Hadron Collider. With 414 observed WW candidate events and an estimated background of 170$\pm$28 events, the measured WW production cross section is $48.2 \pm 4.0 {\rm(stat)} \pm 6.4 {\rm(syst)} \pm 1.8 {\rm(lumi)}$ pb, in agreement with the Standard Model NLO prediction of 46$\pm$3 pb.

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