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arXiv 1108.4101hep-ex
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用ATLAS实验测量sqrt(s)= 7 TeV的pp碰撞中W到τ nu截面

Measurement of the W to tau nu Cross Section in pp Collisions at sqrt(s) = 7 TeV with the ATLAS experiment

ATLAS Collaboration

摘要:

在大型强子对撞机上用ATLAS探测器测量了W玻色子产生的截面,并随后衰变为W到τ nu。该分析基于2010年记录的质子-质子质心能量为7 TeV的数据样本,对应的积分亮度为34 pb^-1。截面在高检测器接受度的区域中测量,然后外推到全相空间。总W产生截面和W与τ nu分支比的乘积被测量为11.1 +/-0.3(stat)+/-1.7(syst)+/-0.4(lumi)nb。

英文摘要:

The cross section for the production of W bosons with subsequent decay W to tau nu is measured with the ATLAS detector at the LHC. The analysis is based on a data sample that was recorded in 2010 at a proton-proton center-of-mass energy of sqrt(s) = 7 TeV and corresponds to an integrated luminosity of 34 pb^-1. The cross section is measured in a region of high detector acceptance and then extrapolated to the full phase space. The product of the total W production cross section and the W to tau nu branching ratio is measured to be 11.1 +/- 0.3 (stat) +/- 1.7 (syst) +/- 0.4 (lumi) nb.

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