"Table 21" 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√s=13 TeV的质子-质子碰撞过程，测量了高动量增强成对产生顶夸克的微分截面，测量变量为顶夸克及t反t系统的运动学可观测量。 该数据集采用欧洲核子研究中心（CERN）大型强子对撞机（Large Hadron Collider, LHC）上的ATLAS探测器于2015至2016年间采集，对应的积分亮度（integrated luminosity）为36.1 fb⁻¹。 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（transverse momentum, p_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。 将测量得到的能谱针对探测器效应进行校正，修正至粒子级 fiducial相空间（fiducial phase space）与部分子级受限相空间（parton-level limited phase space），并通过计算得到的χ²值与多款蒙特卡洛（Monte Carlo）模拟结果进行比对。 该fiducial相空间区域内t反t对产生的截面测量值为292 ± 7(统计) ± 76(系统) fb，其可与384 ± 36 fb的理论预言值进行比对。