"Table 43" of "Measurement of differential cross sections and charge ratios for $t$-channel single top quark production in proton-proton collisions at $\sqrt{s}=$ 13 TeV"

A measurement is presented of differential cross sections for $t$-channel single top quark and antiquark production in proton-proton collisions at a centre-of-mass energy of $13~\rm{TeV}$ by the CMS experiment at the LHC. From a data set corresponding to an integrated luminosity of $35.9~\rm{fb}^{-1}$, events containing one muon or electron and two or three jets are analysed. The cross section is measured as a function of the top quark transverse momentum ($p_{\rm{T}}$), rapidity, and polarisation angle, the charged lepton $p_{\rm{T}}$ and rapidity, and the $p_{\rm{T}}$ of the W boson from the top quark decay. In addition, the charge ratio is measured differentially as a function of the top quark, charged lepton, and W boson kinematic observables. The results are found to be in agreement with standard model predictions using various next-to-leading-order event generators and sets of parton distribution functions. Additionally, the spin asymmetry, sensitive to the top quark polarisation, is determined from the differential distribution of the polarisation angle at parton level to be $0.440 \pm 0.070$, in agreement with the standard model prediction.

本工作报道了大型强子对撞机（Large Hadron Collider, LHC）上的紧凑型μ子螺线管（Compact Muon Solenoid, CMS）实验，在质心能量为13 TeV的质子-质子碰撞中，t道单顶夸克与反顶夸克产生过程的微分截面测量结果。本分析使用对应积分亮度为35.9 fb⁻¹的数据集，对包含1个μ子或电子、以及2或3个喷注的事例展开研究。我们测量了截面随顶夸克横向动量（transverse momentum, $p_mathrm{T}$）、快度、极化角，带电轻子横向动量与快度，以及顶夸克衰变产生的W玻色子（W boson）横向动量的变化关系。此外，我们以顶夸克、带电轻子与W玻色子的运动学可观测量为变量，对电荷比开展了微分测量。结果与基于多种次领头阶（next-to-leading-order）事件产生器（event generators）及多组部分子分布函数（parton distribution functions）得到的标准模型（Standard Model, SM）预言相符。另外，对顶夸克极化敏感的自旋不对称度（spin asymmetry），通过部分子层次（parton level）下极化角的微分分布测得为$0.440 pm 0.070$，与标准模型预言一致。