Measurements of top quark pair relative differential cross-sections with ATLAS in pp collisions at √s=7 TeV
Measurements of top quark pair relative differential cross-sections with ATLAS in pp collisions at √s=7 TeV
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DOI：
10.1140/epjc/s10052-012-2261-1
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发表时间：
2013-01-01
影响因子：
4.4
通讯作者：
Zwalinski, L.
中科院分区：
文献类型：
--
作者：
Aad, G.;Abajyan, T.;Zwalinski, L.
本文测量了在pp根部碰撞中，S=7TeV顶夸克对产生的微分截面相对于包含顶夸克对产生的总截面。使用的是由大型强子对撞机的ATLAS探测器记录的2.05 fB(-1)的数据样本。相对微分截面是顶夸克对系统质量不变、横动量和快度的函数。事件是在轻子(电子或µ子)+喷气通道中选择的。扣除背景的微分分布被校正为探测器效应，归一化为包含顶夸克对产生的总截面，并与理论预测进行了比较。测量不确定度通常在10%到20%之间，通常受系统影响的影响。没有观察到与标准模型预期的显著偏离。
Measurements are presented of differential cross-sections for top quark pair production in pp collisions at root s = 7 TeV relative to the total inclusive top quark pair production cross-section. A data sample of 2.05 fb(-1) recorded by the ATLAS detector at the Large Hadron Collider is used. Relative differential cross-sections are derived as a function of the invariant mass, the transverse momentum and the rapidity of the top quark pair system. Events are selected in the lepton (electron or muon) + jets channel. The background-subtracted differential distributions are corrected for detector effects, normalized to the total inclusive top quark pair production cross-section and compared to theoretical predictions. The measurement uncertainties range typically between 10 % and 20 % and are generally dominated by systematic effects. No significant deviations from the Standard Model expectations are observed.