QCD evolution at one percent precision

百分之一精度的 QCD 演化

• 批准号: 398146914
• 负责人: Professor Dr. Sven-Olaf Moch
• 金额: --
• 依托单位: II. Institut für Theoretische Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/398146914?language=en
• 关键词: QCD; evolution; percent; precision

The proton’s parton content is parameterized in terms of universal parton distribution functions whose scale dependence is governed by the evolution equations in Quantum Chromodynamics (QCD) through the splitting functions. Splitting functions are calculable within perturbative QCD and the project aims at computing them at four-loop accuracy. This information will reduce the theoretical uncertainty in the QCD evolution to the one percent level and it is necessary in order to match the precision of the available experimental data from the Large Hadron Collider and the world data on deep-inelastic scattering (DIS). The project aims at making a decisive step towards completing the next-to-next-to-next-to-leading order (N3LO) QCD description of hard scattering reactions at hadron colliders. The results will be used to determine the strong coupling constant from the world DIS data at N3LO accuracy with a theoretical uncertainty of less than one percent.

质子的分子含量是用普适分子分布函数来参数化的，普适分子分布函数的尺度依赖性由量子色动力学中的演化方程通过分裂函数来控制。在微扰QCD中，分裂函数是可计算的，该项目旨在以四环精度计算它们。这一信息将把QCD演化的理论不确定性降低到百分之一的水平，并且为了与大型强子对撞机的现有实验数据和世界深度非弹性散射（DIS）数据的精度相匹配，这是必要的。该项目旨在朝着完成强子对撞机硬散射反应的次-次-次-次-领先顺序（N3LO） QCD描述迈出决定性的一步。该结果将用于从N3LO精度的世界DIS数据中确定强耦合常数，理论不确定性小于1%。

项目成果

Anomalous dimensions and splitting functions beyond the next-to-next-to-leading order

异常维度和分裂函数超出了次次领先顺序

• DOI: 10.22323/1.303.0050
• 发表时间: 2018
• 期刊: Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018)
• 作者: A. Vogt;F. Herzog;S. Moch;B. Ruijl;T. Ueda;J. A. M. Vermaseren
• 通讯作者: J. A. M. Vermaseren

Soft corrections to inclusive deep-inelastic scattering at four loops and beyond

对四环及以上的包容性深度非弹性散射进行软校正

• DOI: 10.1007/jhep03(2020)116
• 发表时间: 2020
• 期刊: Journal of High Energy Physics
• 影响因子: 5.4
• 作者: G. Das;S. Moch;A. Vogt
• 通讯作者: A. Vogt

On quartic colour factors in splitting functions and the gluon cusp anomalous dimension

• DOI: 10.1016/j.physletb.2018.06.017
• 发表时间: 2018-05
• 期刊: Physics Letters B
• 影响因子: 4.4
• 作者: S. Moch;B. Ruijl;Takahiro Ueda;J. Vermaseren;A. Vogt

Five-loop contributions to low-N non-singlet anomalous dimensions in QCD

五环对 QCD 中低 N 非单态反常维度的贡献

• DOI: 10.1016/j.physletb.2019.01.060
• 发表时间: 2019
• 期刊: Physics Letters B
• 影响因子: 4.4
• 作者: F. Herzog;S. Moch;B. Ruijl;T. Ueda;J.A.M. Vermaseren;A. Vogt
• 通讯作者: A. Vogt

Approximate four-loop QCD corrections to the Higgs-boson production cross section

对希格斯玻色子产生截面的近似四环 QCD 校正

• DOI: 10.1016/j.physletb.2020.135546
• 发表时间: 2020
• 期刊: Physics Letters B
• 影响因子: 4.4
• 作者: G. Das;S. Moch;A. Vogt
• 通讯作者: A. Vogt