"Table 65" 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.

本数据集针对质心能量√s=13 TeV的质子-质子碰撞，以顶夸克及tar{t}系统的运动学可观测量为函数，测量了高快度成对产生顶夸克的微分截面。该数据集对应的实验数据采集于2015至2016年，使用欧洲核子研究中心（CERN）大型强子对撞机上的ATLAS探测器（ATLAS）获取，积分亮度为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p_T大于350 GeV。通过喷注子结构信息以及与b标记喷注的关联，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，我们校正了探测器效应带来的影响，将其修正至粒子级 fiducial相空间（fiducial phase space）与部分子级受限相空间，并通过计算得到的卡方（χ²）值与多种蒙特卡罗模拟结果进行对比。fiducial相空间区域内tar{t}产生的截面为292 ± 7(统计) ± 76(系统) fb，可与理论预言值384 ± 36 fb进行对比。