QCD 三阶下 Drell-Yan 过程中双轻子快度分布

Dilepton Rapidity Distribution in Drell-Yan Production to Third Order in QCD.

作者信息

Chen Xuan, Gehrmann Thomas, Glover Nigel, Huss Alexander, Yang Tong-Zhi, Zhu Hua Xing

机构信息

Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland.

Institute for Theoretical Physics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany.

出版信息

Phys Rev Lett. 2022 Feb 4;128(5):052001. doi: 10.1103/PhysRevLett.128.052001.

DOI:10.1103/PhysRevLett.128.052001

PMID:35179917

Abstract

We compute for the first time the lepton-pair rapidity distribution in the photon-mediated Drell-Yan process to next-to-next-to-next-to-leading order in QCD. The calculation is based on the q_{T}-subtraction method, suitably extended to this order for quark-antiquark initiated Born processes. Our results display sizeable QCD corrections at next-to-next-to-next-to-leading order over the full rapidity region and provide a fully independent confirmation of the recent results for the total Drell-Yan cross section at this order.

摘要

我们首次在 QCD 中计算了光子介导的 Drell-Yan 过程中轻子对快度分布至次次次领头阶。该计算基于 (q_T) 减法方法，此方法已针对夸克 - 反夸克初态的 Born 过程适当地扩展至该阶。我们的结果显示在整个快度区域中次次次领头阶存在可观的 QCD 修正，并为该阶下 Drell-Yan 总截面的近期结果提供了完全独立的验证。