论文标题
使用$ \ mathrm {t \ bar {t}} $ event
Search for CP violation using $\mathrm{t\bar{t}}$ events in the lepton+jets channel in pp collisions at $\sqrt{s}$ = 13 TeV
论文作者
论文摘要
在Lepton+Jets Channel的顶级Quark-Antiquark对的生产和衰减中搜索违反CP的侵犯和衰减时，结果显示了结果。该搜索基于与CMS检测器收集的13 TEV的Proton-Proton碰撞的数据，对应于138 fb $^{ - 1} $的集成光度。通过测量由最终状态颗粒的线性独立的四弹载体构建的观察物中未校正的不对称性来评估可能的CP违规效应。从观察到的不对称的顶部夸克的无量纲染色体偶极矩，测得为0.04 $ \ pm $ 0.10 $ 0.10（Stat）$ \ pm $ 0.07（SYST）（Syst），不对称的cp-violating效果没有证据表明CP-Violating效应，与标准模型的预期一致。
Results are presented on a search for CP violation in the production and decay of top quark-antiquark pairs in the lepton+jets channel. The search is based on data from proton-proton collisions at 13 TeV, collected with the CMS detector, corresponding to an integrated luminosity of 138 fb$^{-1}$. Possible CP violation effects are evaluated by measuring uncorrected asymmetries in observables constructed from linearly independent four-momentum vectors of the final-state particles. The dimensionless chromoelectric dipole moment of the top quark obtained from the observed asymmetries is measured to be 0.04 $\pm$ 0.10 (stat) $\pm$ 0.07 (syst), and the asymmetries exhibit no evidence for CP-violating effects, consistent with expectations from the standard model.
