"Table 59" of "Measurements of $t\bar{t}$ differential cross-sections of highly boosted top quarks decaying to all-hadronic final states in $pp$ collisions at $\sqrt{s}=13\,$ TeV using the ATLAS detector"

Measurements are made of differential cross-sections of highly boosted pair-produced top quarks as a function of top-quark and $t\bar{t}$ system kinematic observables using proton--proton collisions at a center-of-mass energy of $\sqrt{s} = 13$ TeV. The data set corresponds to an integrated luminosity of $36.1$ fb$^{-1}$, recorded in 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider. Events with two large-radius jets in the final state, one with transverse momentum $p_{\rm T} > 500$ GeV and a second with $p_{\rm T} > 350$ GeV, are used for the measurement. The top-quark candidates are separated from the multijet background using jet substructure information and association with a $b$-tagged jet. The measured spectra are corrected for detector effects to a particle-level fiducial phase space and a parton-level limited phase space, and are compared to several Monte Carlo simulations by means of calculated $\chi^2$ values. The cross-section for $t\bar{t}$ production in the fiducial phase-space region is $292 \pm 7 \rm{(stat)} \pm 76 \rm{(syst)}$ fb, to be compared to the theoretical prediction of $384 \pm 36$ fb.本数据集基于质心系能量√s=13 TeV的质子-质子碰撞数据，测量了高度相对论性增强的成对产生顶夸克的微分截面（differential cross-sections），测量结果以顶夸克及$tar{t}$（顶夸克-反顶夸克对）系统的运动学可观测量作为自变量。所用数据取自欧洲核子研究中心（CERN）大型强子对撞机（Large Hadron Collider, LHC）上的ATLAS探测器于2015至2016年间采集的实验数据，对应积分亮度（integrated luminosity）为36.1 fb⁻¹。 本次分析选取末态包含两个大半径喷注（large-radius jets）的事件：其中一个喷注的横向动量（transverse momentum, $p_T$）大于500 GeV，另一个喷注的横向动量大于350 GeV，用于截面测量。通过喷注子结构（jet substructure）信息以及与b标记喷注（b-tagged jet）的关联，可将顶夸克候选事件与多喷注本底区分开来。 针对测量得到的能谱，研究团队校正了探测器效应带来的影响，将其校正至粒子级 fiducial相空间（fiducial phase space）与部分子级限定相空间，并通过计算得到的卡方值（$chi^2$），将测量结果与多种蒙特卡洛模拟（Monte Carlo simulations）进行对比。在该fiducial相空间区域内，$tar{t}$对产生的截面为292 ± 7(统计误差) ± 76(系统误差) fb，该结果可与理论预言值384 ± 36 fb进行对比。