论文标题
树级分裂的振幅，用于四个共线partons
Tree-level splitting amplitudes for a gluon into four collinear partons
论文作者
论文摘要
我们在常规尺寸正则化中计算了一个绿色父母的树级分裂振幅，该振幅将分裂为四个共线partons。这是QCD散射幅度在下一到隔离到领先顺序（n $^3 $ lo）中QCD散射幅度的通用红外行为的一部分。结合我们对夸克父母的较早结果，这完成了此订单上所需的一组树级分裂振幅。我们还研究了迭代的共线限制，其中四个共线部分中的一个子集成为了本身。
We compute in conventional dimensional regularisation the tree-level splitting amplitudes for a gluon parent which splits into four collinear partons. This is part of the universal infrared behaviour of the QCD scattering amplitudes at next- to-next-to-next-to-leading order (N$^3$LO) in the strong coupling constant. Combined with our earlier results for a quark parent, this completes the set of tree-level splitting amplitudes required at this order. We also study iterated collinear limits where a subset of the four collinear partons become themselves collinear.
