Alekhin S, Amoroso S, Buonocore L, Huss A, Kallweit S, Kardos A, Michel J, Moch S, Petriello F, Rottoli L, Trócsányi Z, Wiesemann M
II. Institut für Theoretische Physik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.
Eur Phys J C Part Fields. 2025;85(4):406. doi: 10.1140/epjc/s10052-025-14027-x. Epub 2025 Apr 10.
We compute differential distributions for Drell-Yan processes at the LHC and the Tevatron colliders at next-to-next-to-leading order in perturbative QCD, including fiducial cuts on the decay leptons in the final state. The comparison of predictions obtained with four different codes shows excellent agreement, once linear power corrections from the fiducial cuts are included in those codes that rely on phase-space slicing subtraction schemes. For -boson production we perform a detailed study of the symmetric cuts on the transverse momenta of the decay leptons. Predictions at fixed order in perturbative QCD for those symmetric cuts, typically imposed in experiments, suffer from an instability. We show how this can be remedied by an all-order resummation of the fiducial transverse momentum spectrum, and we comment on the choice of cuts for future experimental analyses.
我们在微扰量子色动力学中，以次下一个领先阶计算了大型强子对撞机（LHC）和万亿电子伏特加速器（Tevatron）对撞机上Drell-Yan过程的微分分布，包括对末态衰变轻子的基准切割。对使用四种不同程序得到的预测结果进行比较，结果表明，一旦在依赖相空间切片减法方案的程序中纳入来自基准切割的线性幂次修正，它们就会显示出极佳的一致性。对于玻色子产生过程，我们对衰变轻子的横向动量的对称切割进行了详细研究。微扰量子色动力学中针对那些通常在实验中施加的对称切割的固定阶预测存在不稳定性。我们展示了如何通过对基准横向动量谱进行全阶重整化来弥补这一问题，并对未来实验分析中切割的选择进行了评论。
