"Table 49" 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-质子对撞（proton-proton collisions），测量了高快度成对产生顶夸克（top quark）的微分截面，该截面的取值依赖于顶夸克及顶夸克-反顶夸克（$t\bar{t}$）系统的运动学可观测量。该数据集使用欧洲核子研究中心（CERN）大型强子对撞机（Large Hadron Collider, LHC）上的ATLAS探测器（ATLAS）在2015至2016年采集的数据，对应的积分亮度为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, $p_{\rm T}$）大于500 GeV，另一个喷注的横向动量大于350 GeV。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，将顶夸克候选事件从多喷注本底中分离出来。对测得的能谱进行探测器效应校正，将其转换至粒子层面的 fiducial相空间（fiducial phase space）以及部分子层面的限定相空间，并通过计算卡方（$\chi^2$）值与多款蒙特卡洛模拟（Monte Carlo simulation）结果进行比对。在该fiducial相空间区域内，顶夸克-反顶夸克对产生的截面为$292 pm 7 m{(统计误差)} pm 76 m{(系统误差)}$ fb，可与理论预言值$384 pm 36$ fb进行比对。