论文标题
高夸克对事件中差分横截面的测量值高横向动量顶部夸克，并限制超出标准模型对顶级对生产的标准模型贡献，而Atlas检测器则在$ \ sqrt {s} = 13 $ tev
Measurements of differential cross-sections in top-quark pair events with a high transverse momentum top quark and limits on beyond the Standard Model contributions to top-quark pair production with the ATLAS detector at $\sqrt{s}=13$ TeV
论文作者
论文摘要
顶截面的横截面测量值，其中强调腐烂的顶级夸克的横向动量大于$ 355 $ GEV，而其他顶级夸克腐烂成$ \ellνb$，使用139 fb $^{ - 1} $使用Atlas实验在Proton-Proton碰撞期间在LHC上收集的数据。 $ \ sqrt {s} = 13 $ tev的基准横截面的测量为$σ= 1.267 \ pm 0.005 \ pm 0.053 $ pb，其中不确定性反映了数据事件的有限数量和系统的不确定性，这给出了4.2美元的不确定性。横截面的测量是表征$ t \ bar {t} $系统和事件中其他辐射的变量的函数。将结果与各种蒙特卡洛发生器进行了比较，包括比较，在该比较中，将发电机重新加权以匹配近代到领先顺序的Parton级计算。重新加权改善了数据和理论之间的一致性。最高的横向动量的测量分布用于在尺寸六算子的Wilson系数上设置限制$ o_ o_ {tg} $和$ o_ {tq}^{（8）} $在有效的字段理论框架中。
Cross-section measurements of top-quark pair production where the hadronically decaying top quark has transverse momentum greater than $355$ GeV and the other top quark decays into $\ell νb$ are presented using 139 fb$^{-1}$ of data collected by the ATLAS experiment during proton-proton collisions at the LHC. The fiducial cross-section at $\sqrt{s}=13$ TeV is measured to be $σ= 1.267 \pm 0.005 \pm 0.053$ pb, where the uncertainties reflect the limited number of data events and the systematic uncertainties, giving a total uncertainty of $4.2\%$. The cross-section is measured differentially as a function of variables characterising the $t\bar{t}$ system and additional radiation in the events. The results are compared with various Monte Carlo generators, including comparisons where the generators are reweighted to match a parton-level calculation at next-to-next-to-leading order. The reweighting improves the agreement between data and theory. The measured distribution of the top-quark transverse momentum is used to set limits on the Wilson coefficients of the dimension-six operators $O_{tG}$ and $O_{tq}^{(8)}$ in the effective field theory framework.
