Chen Xuan, Gehrmann Thomas, Glover Nigel, Huss Alexander, Monni Pier Francesco, Re Emanuele, Rottoli Luca, Torrielli Paolo
Institute for Theoretical Physics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany.
Institute for Astroparticle Physics, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany.
Phys Rev Lett. 2022 Jun 24;128(25):252001. doi: 10.1103/PhysRevLett.128.252001.
The Drell-Yan process at hadron colliders is a fundamental benchmark for the study of strong interactions and the extraction of electroweak parameters. The outstanding precision of the LHC demands very accurate theoretical predictions with a full account of fiducial experimental cuts. In this Letter we present a state-of-the-art calculation of the fiducial cross section and of differential distributions for this process at third order in the strict fixed-order expansion in the strong coupling, as well as including the all-order resummation of logarithmic corrections. Together with these results, we present a detailed study of the subtraction technique used to carry out the calculation for different sets of experimental cuts, as well as of the sensitivity of the fiducial cross section to infrared physics. We find that residual theory uncertainties are reduced to the percent level and that the robustness of the predictions can be improved by a suitable adjustment of fiducial cuts.
强子对撞机中的Drell-Yan过程是研究强相互作用和提取电弱参数的一个基本基准。大型强子对撞机卓越的精度要求在充分考虑实验基准切割的情况下进行非常精确的理论预测。在本信函中，我们给出了该过程在强耦合严格固定阶展开下三阶的基准截面和微分分布的最新计算结果，同时还包括对数修正的全阶重整化。连同这些结果，我们详细研究了用于针对不同实验切割集进行计算的减除技术，以及基准截面对红外物理的敏感性。我们发现残余理论不确定性降低到了百分之几的水平，并且通过适当调整基准切割可以提高预测的稳健性。
