"Table 6" of "Measurement of the differential cross section for top quark pair production in pp collisions at sqrt(s) = 8 TeV"

CERN-LHC. The normalized differential cross section for top quark pair (ttbar) production is measured in pp collisions at a centre-of-mass energy of 8 TeV at the CERN LHC using the CMS detector in data corresponding to an integrated luminosity of 19.7 inverse femtobarns. The measurements are performed in the lepton+jets (e/mu+jets) and in the dilepton (e e, mu mu, and e mu) decay channels. The ttbar cross section is measured as a function of the kinematic properties of the charged leptons, the jets associated to b quarks, the top quarks, and the ttbar system. The data are compared with several predictions from perturbative QCD up to approximate next-to-next-to-leading-order precision. No significant deviations are observed relative to the standard model predictions.

CERN-LHC数据集：本实验在欧洲核子研究中心大型强子对撞机（CERN LHC）上，借助紧凑型μ子线圈（CMS）探测器，采用积分亮度为19.7反飞靶的实验数据，测量质心系能量为8 TeV的质子-质子（pp）碰撞中顶夸克对（ttbar）产生过程的归一化微分截面。测量分别在轻子+喷注（e/mu+jets，即电子/μ子+喷注）与双轻子（e e、mu mu、e mu，即电子对、μ子对、电子-μ子对）衰变道中开展。本研究将顶夸克对截面作为带电轻子、与b夸克关联的喷注、顶夸克以及顶夸克对系统的运动学特性的函数进行测量。将实验数据与微扰量子色动力学（perturbative QCD）在近似次次次领头阶精度下的多项理论预言进行对比，结果未观测到与标准模型（Standard Model）预言存在显著偏差。