论文标题
朝着两个循环的颜色流程演变
Towards Colour Flow Evolution at Two Loops
论文作者
论文摘要
我们计算近次领先顺序的软gluon演化所需的双环/一环/一环贡献。颜色结构以颜色流量为基础表示，运动依赖性和循环积分以多个切割和类似相位的积分表示。这直接允许将它们用于重新召集非全球可观察物，并改进了领先顺序和领先颜色限制之外的Parton淋浴算法。在颜色流程的基础上，很明显，即使在虚拟校正的颜色二角元素中，相关性超出了偶极子图像。
We calculate the two-loop and one-loop/one-emission contributions required for soft gluon evolution at the next-to-leading order. The colour structures are expressed in the colour flow basis, and the kinematic dependence and loop integrals are expressed in terms of multiple cuts and phase-space-like integrals. This directly allows to use them in the resummation of non-global observables and improved parton shower algorithms beyond the leading order and beyond the leading colour limit. Within the colour flow basis it becomes apparent that correlations beyond a dipole picture emerge even in colour-diagonal elements of the virtual corrections.
