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arXiv 1203.6232hep-ex
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用ATLAS探测器测量sqrt(s)= 7 TeV pp碰撞中的WW截面和对异常规范耦合的限制

Measurement of the WW cross section in sqrt(s) = 7 TeV pp collisions with the ATLAS detector and limits on anomalous gauge couplings

ATLAS Collaboration

摘要:

这封信报告了在sqrt(s)= 7 TeV pp碰撞中WW产生截面的测量,使用的数据对应于ATLAS探测器收集的1.02/fb的积分亮度。利用带相反电荷的W玻色子的轻子衰变,测得的总截面为σ(pp -> WW)= 54.4 +/- 4.0(stat.)+/- 3.9(系统)+/- 2.0(流明)pb,与标准模型预测的sigma(pp -> WW)= 44.4 +/- 2.8 pb一致。异常电弱三规范耦合的限制提取从一个适合的领先的带电轻子的横动量分布的事件。

英文摘要:

This Letter reports a measurement of the WW production cross section in sqrt(s) = 7 TeV pp collisions using data corresponding to an integrated luminosity of 1.02/fb collected with the ATLAS detector. Using leptonic decays of oppositely charged W bosons, the total measured cross section is sigma(pp -> WW) = 54.4 +/- 4.0 (stat.) +/- 3.9 (syst.) +/- 2.0 (lumi.) pb, consistent with the Standard Model prediction of sigma(pp -> WW) = 44.4 +/- 2.8 pb. Limits on anomalous electroweak triple-gauge couplings are extracted from a fit to the transverse-momentum distribution of the leading charged lepton in the event.

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