"Table 66" 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）上的紧凑缪子线圈（Compact Muon Solenoid, CMS）实验，在质心能量13 TeV的质子-质子碰撞中，针对t道单顶夸克与反顶夸克产生过程的微分截面测量结果。本次分析使用积分亮度为$35.9~
m{fb}^{-1}$的数据集，对包含单个μ子或电子以及2至3个喷注的事例展开研究。本测量以顶夸克的横向动量（transverse momentum, $p_mathrm{T}$）、快度（rapidity）与极化角（polarisation angle），带电轻子（charged lepton）的横向动量与快度，以及顶夸克衰变产生的W玻色子（W boson）的横向动量作为观测变量，对截面进行了测定。此外，本工作还以顶夸克、带电轻子与W玻色子的运动学可观测量作为变量，对电荷比进行了微分测量。测量结果与标准模型（Standard Model, SM）的预言相符，该预言基于多种次领头阶（next-to-leading order, NLO）事件产生器（event generator）以及多套部分子分布函数（parton distribution functions, PDFs）得到。另外，针对与顶夸克极化敏感的自旋不对称度（spin asymmetry），本工作通过部分子层次（parton level）下极化角的微分分布对其进行了测定，结果为$0.440 pm 0.070$，与标准模型预言一致。