论文标题
四环QCD中的尖和共线异常尺寸来自形式因素
Cusp and collinear anomalous dimensions in four-loop QCD from form factors
论文作者
论文摘要
我们通过第一原理分析四环QCD中的四环QCD中的完整夸克和gluon尖尖。此外，我们确定夸克和胶孔孔异常尺寸的完整物质依赖性。我们的方法是在尺寸正则化参数中扩大四环夸克和gluon形式的方法。我们采用有限的字段和Syzygy技术来将相关的Feynman积分降低为有限积分的基础，然后直接从其标准参数表示中直接评估基础积分。
We calculate the complete quark and gluon cusp anomalous dimensions in four-loop massless QCD analytically from first principles. In addition, we determine the complete matter dependence of the quark and gluon collinear anomalous dimensions. Our approach is to Laurent expand four-loop quark and gluon form factors in the parameter of dimensional regularization. We employ finite field and syzygy techniques to reduce the relevant Feynman integrals to a basis of finite integrals, and subsequently evaluate the basis integrals directly from their standard parametric representations.
