论文标题
与Atlas detector一起的单级频道中的单Quark生产与单勒普顿频道中的$ W $ Boson的测量
Measurement of single top-quark production in association with a $W$ boson in the single-lepton channel at $\sqrt{s} = 8$ TeV with the ATLAS detector
论文作者
论文摘要
与$ w $玻色子联合的顶级夸克的生产横截面是使用$ \ sqrt {s} = 8 $ tev的质子 - 普罗顿碰撞测量的。该数据集对应于20.2 fb $^{ - 1} $的集成光度，并于2012年由Atlas检测器在CERN的大型强生对撞机上收集。该分析在单仪通过通道中进行。通过需要一个孤立的Lepton（电子或MUON）和至少三个喷气机来选择事件。对神经网络进行了训练，可以将$ TW $信号与主要的$ t \ bar {t} $背景分开。横截面是从BINNED轮廓最大样本拟合中提取的，以从神经网络输出和强发衰减的$ w $ boson构建的二维判别物中提取。测得的横截面为$σ_{TW} = 26 \ PM 7 $ PB，与标准模型期望非常吻合。
The production cross-section of a top quark in association with a $W$ boson is measured using proton-proton collisions at $\sqrt{s} = 8$ TeV. The dataset corresponds to an integrated luminosity of 20.2 fb$^{-1}$, and was collected in 2012 by the ATLAS detector at the Large Hadron Collider at CERN. The analysis is performed in the single-lepton channel. Events are selected by requiring one isolated lepton (electron or muon) and at least three jets. A neural network is trained to separate the $tW$ signal from the dominant $t\bar{t}$ background. The cross-section is extracted from a binned profile maximum-likelihood fit to a two-dimensional discriminant built from the neural-network output and the invariant mass of the hadronically decaying $W$ boson. The measured cross-section is $σ_{tW} = 26 \pm 7$ pb, in good agreement with the Standard Model expectation.
