论文标题
两点函数在扰动理论中的不可整合阈值奇点
Nonintegrable threshold singularities of two-point functions in perturbation theory
论文作者
论文摘要
在扰动理论中，两点函数的频谱密度在较高阶的较高阶段会产生不可集成的阈值奇点。在QCD中，当用极夸克质量计算图表时，会出现这种奇异性，并且当一个人根据运行夸克质量重新排列扰动膨胀时会变得更强大。在本文中，我们讨论了处理此类奇点的正确方法。
In perturbation theory, the spectral densities of two-point functions develop non-integrable threshold singularities at higher orders. In QCD, such singularities emerge when calculating the diagrams in terms of the pole quark mass, and they become stronger when one rearranges the perturbative expansion in terms of the running quark mass. In this paper we discuss the proper way to handle such singularities.
