在 Tevatron 上进行的顶夸克-反顶夸克产生中的正反向前向不对称测量。
Combined Forward-Backward Asymmetry Measurements in Top-Antitop Quark Production at the Tevatron.
机构信息
Division of High Energy Physics, Department of Physics, University of Helsinki, FIN-00014, Helsinki, Finland; Helsinki Institute of Physics, FIN-00014 Helsinki, Finland.
Joint Institute for Nuclear Research, RU-141980 Dubna, Russia.
出版信息
Phys Rev Lett. 2018 Jan 26;120(4):042001. doi: 10.1103/PhysRevLett.120.042001.
The CDF and D0 experiments at the Fermilab Tevatron have measured the asymmetry between yields of forward- and backward-produced top and antitop quarks based on their rapidity difference and the asymmetry between their decay leptons. These measurements use the full data sets collected in proton-antiproton collisions at a center-of-mass energy of sqrt[s]=1.96 TeV. We report the results of combinations of the inclusive asymmetries and their differential dependencies on relevant kinematic quantities. The combined inclusive asymmetry is A_{FB}^{tt[over ¯]}=0.128±0.025. The combined inclusive and differential asymmetries are consistent with recent standard model predictions.
费米实验室 Tevatron 的 CDF 和 D0 实验基于快度差和衰变轻子的不对称性，测量了前向和后向产生的顶夸克和反顶夸克产额之间的不对称性。这些测量使用了在质心能量为 sqrt[s]=1.96 TeV 的质子-反质子碰撞中收集的全部数据集。我们报告了包含不对称性及其对相关运动学量的微分依赖性的组合结果。组合的包含不对称性为 A_{FB}^{tt[over ¯]}=0.128±0.025。组合的包含和微分不对称性与最近的标准模型预测一致。
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