"Table 58" 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.

本数据集针对质心系能量$\sqrt{s}=13$ TeV的质子-质子对撞数据，测量成对产生的高动量增强顶夸克的微分截面随顶夸克及顶夸克-反顶夸克（$t\bar{t}$）系统运动学可观测量的分布变化。所用数据由欧洲核子研究中心（CERN）大型强子对撞机（Large Hadron Collider）的ATLAS探测器于2015年至2016年采集，积分亮度为$36.1\ \mathrm{fb^{-1}}$。
本次分析选取末态包含两个大半径喷注的事件：其中一个喷注的横向动量$p_{\rm T} > 500\ \mathrm{GeV}$，另一个喷注的横向动量$p_{\rm T} > 350\ \mathrm{GeV}$。通过喷注子结构信息以及与b标记喷注（$b$-tagged jet）的关联，将顶夸克候选事例与多喷注本底区分开来。
针对探测器效应，将测量得到的能谱校正至粒子级 fiducial 相空间（particle-level fiducial phase space）与部分子级限定相空间（parton-level limited phase space），并通过计算卡方（$\chi^2$）值与多款蒙特卡洛（Monte Carlo）模拟结果进行对比。
该fiducial相空间区域内$t\bar{t}$产生截面的测量结果为$292 \pm 7\ \mathrm{(统计误差)} \pm 76\ \mathrm{(系统误差)}\ \mathrm{fb}$，可与理论预言值$384 \pm 36\ \mathrm{fb}$进行对照。