论文标题
LHC的Drell-Yan的三阶基准预测
Third order fiducial predictions for Drell-Yan at the LHC
论文作者
论文摘要
强子围栏的DREL-YAN过程是研究强相互作用和提取电动参数的基本基准。 LHC的出色精度需要非常准确的理论预测，并全面说明了基准实验削减。在这封信中，我们介绍了基准横截面的最新计算和该过程的差分分布，该过程在强耦合中严格的固定顺序扩展中，以及对数校正的全阶重新介绍。与这些结果一起，我们介绍了用于对不同实验削减组以及基准横截面对红外物理学的敏感性进行计算的减法技术的详细研究。我们发现，残留理论的不确定性降低到百分比的百分比，并且可以通过适当的基准切割来改善预测的鲁棒性。
The Drell-Yan process at hadron colliders is a fundamental benchmark for the study of strong interactions and the extraction of electro-weak 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.
