论文标题
$ \ mathrm {t \ bar {t}}的测量在$ \ sqrt {s} $ = 13 tev中，在PP碰撞中具有高度lorentz-Boosted top Quarks的事件中的不对称性。
Measurement of the $\mathrm{t\bar{t}}$ charge asymmetry in events with highly Lorentz-boosted top quarks in pp collisions at $\sqrt{s}$ = 13 TeV
论文作者
论文摘要
提出了在顶级夸克对事件中的电荷不对称性测量，并提出了高度洛伦兹的顶级夸克，从而衰减了单个Lepton和Jets。分析是使用$ \ sqrt {s} $ = 13 tev的质子 - 普罗顿碰撞在LHC处使用的CMS检测器，并对应于138 fb $^{ - 1} $的集成光度。该选择是针对具有大型Lorentz增强的顶级夸克进行了优化的，从而导致非分离的瘦素和重叠的喷气机。对于具有$ \ mathrm {t \ bar {t}} $不变质量大于750 GEV的事件，测量了最高的夸克电荷不对称性，并使用binned最大似然拟合进行了检测器和接受效果的校正。测得的顶部夸克电荷不对称为（0.42 $ _ { - 0.69}^{+0.64} $）％与近代彩色动力学扰动理论中的近代临界订单的标准模型预测非常吻合。结果还提供了两个不变的质量范围，750-900和$ \ gt $ 900 GEV。
The measurement of the charge asymmetry in top quark pair events with highly Lorentz-boosted top quarks decaying to a single lepton and jets is presented. The analysis is performed using proton-proton collisions at $\sqrt{s}$ = 13 TeV with the CMS detector at the LHC and corresponding to an integrated luminosity of 138 fb$^{-1}$. The selection is optimized for top quarks produced with large Lorentz boosts, resulting in nonisolated leptons and overlapping jets. The top quark charge asymmetry is measured for events with a $\mathrm{t\bar{t}}$ invariant mass larger than 750 GeV and corrected for detector and acceptance effects using a binned maximum likelihood fit. The measured top quark charge asymmetry of (0.42 $_{-0.69}^{+0.64}$)% is in good agreement with the standard model prediction at next-to-next-to-leading order in quantum chromodynamic perturbation theory with next-to-leading-order electroweak corrections. The result is also presented for two invariant mass ranges, 750-900 and $\gt$ 900 GeV.
