论文标题
拓扑充电在一个循环中的Parton分布函数
Parton distribution function for topological charge at one loop
论文作者
论文摘要
我们为最近引入的“拓扑费” GPD $ \ widetilde F（x，q^2）$介绍了单循环校正的$ gg $ - 部分的结果。特别是，我们表达其进化核。为了严格遵守规格不变性要求，我们已将壳状状态用于外部胶状，并在Feynman和Light-Cone仪表中获得了相同的结果。对于Twist-4 Gluon GPD $ \ widetilde f（x，q^2）$，找到了未找到“零模式” $δ（x）$项。
We present results for the $gg$-part of the one-loop corrections to the recently introduced "topological charge" GPD $\widetilde F(x,q^2)$. In particular, we give expression for its evolution kernel. To enforce strict compliance with the gauge invariance requirements, we have used on-shell states for external gluons, and have obtained identical results both in Feynman and light-cone gauges. No "zero mode" $δ(x)$ terms were found for the twist-4 gluon GPD $\widetilde F(x,q^2)$.
