arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1104.5225hep-ex
收藏

在sqrt(s)= 7 TeV pp与ATLAS碰撞中测量PDKEEPAAA截面

Measurement of the WW cross section in sqrt(s) = 7 TeV pp collisions with ATLAS

The ATLAS Collaboration

摘要:

这封信介绍了ATLAS实验对$\sqrt{s} = 7 \TeV\ pp$碰撞中$\WW$产生截面的测量,使用了欧洲核子研究中心大型强子对撞机产生的34个$\pbi$积分光度。选择事件与两个孤立的轻子,每一个电子或μ子,8个候选事件被观察到的预期背景的$1.7\pm0.6$事件。测得的截面为$41^{+20}_{-16}(\mathrm{stat.})\pm 5(\mathrm{syst.})\pm 1(\mathrm{lumi.})$ pb,与QCD中次领先阶计算的$44 \pm 3$ pb的标准模型预测一致。

英文摘要:

This Letter presents a measurement of the $\WW$ production cross section in $\sqrt{s} = 7 \TeV\ pp$ collisions by the ATLAS experiment, using 34 $\pbi$ of integrated luminosity produced by the Large Hadron Collider at CERN. Selecting events with two isolated leptons, each either an electron or a muon, 8 candidate events are observed with an expected background of $1.7\pm0.6$ events. The measured cross section is $41^{+20}_{-16}(\mathrm{stat.})\pm 5(\mathrm{syst.})\pm 1(\mathrm{lumi.})$ pb, which is consistent with the standard model prediction of $44 \pm 3$ pb calculated at next-to-leading order in QCD.

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。

↑