发表机构
Bogoliubov Laboratory of Theoretical Physics, JINR; Department of Physics, Moscow State University（鲍里索夫理论物理实验室，杜布纳联合核子研究所; 莫斯科国立大学物理系）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文定量比较了TMD、pQCD和几何三种理论对Drell-Yan角系数的描述，发现低横动量下TMD对A0和A2描述最佳，并确定A0、A2及Lam-Tung关系为最敏感观测量。
AI 中文摘要
对Drell-Yan Z玻色子产生过程中角系数的三种理论描述（TMD、pQCD和几何方法）的预测，与ATLAS、CMS和LHCb合作组获得的角系数新实验数据进行了定量比较。在低$Q_T$的中心快度区域，在所考虑的描述中，TMD计算对$A_0$和$A_2$系数提供了更好的描述。对于$A_1$、$A_3$和$A_4$系数，各方法之间的差异不太明显。结果确定$A_0$、$A_2$和Lam--Tung关系是低$Q_T$下最敏感的观测量，并展示了三种描述各自的适用范围。
英文摘要
A quantitative comparison of the predictions of three theoretical descriptions (TMD, pQCD and geometrical) of the angular coefficients in Drell-Yan Z-boson production with new experimental data on angular coefficients obtained by the ATLAS, CMS and LHCb collaborations has been performed. In the central rapidity region at low-$Q_T$, the TMD calculation provides a better description of the $A_0$ and $A_2$ coefficients among the descriptions considered. The differences between the approaches are less pronounced for $A_1$,$A_3$ and $A_4$ coefficients. The results identify $A_0$,$A_2$ and the Lam--Tung relation as the most sensitive observables at low-QT and illustrate the domains of applicability of the three descriptions.
Comments18 pages, 7 figures, 1 table
