异常维度和分裂函数超出了倒数第二到倒数第一的顺序

Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018) Pub Date : 2018-08-27 DOI:10.22323/1.303.0050

A. Vogt, F. Herzog, S. Moch, B. Ruijl, Takahiro Ueda, J. Vermaseren

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引用次数: 14

摘要

本文报道了摄动QCD中部分子分布演化的分裂函数及其相关量(类光)尖异常维数的最新进展。提出了四环(次-次-次-次-前序，N^3LO)对风味-单线分裂函数和胶子尖异常维数的贡献的新结果。我们给出了五环(N^4LO)非单重分裂函数的矩N=2和N=3的第一个结果。

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Anomalous dimensions and splitting functions beyond the next-to-next-to-leading order

We report on recent progress on the splitting functions for the evolution of parton distributions and related quantities, the (lightlike) cusp anomalous dimensions, in perturbative QCD. New results are presented for the four-loop (next-to-next-to-next-to-leading order, N^3LO) contributions to the flavour-singlet splitting functions and the gluon cusp anomalous dimension. We present first results, the moments N=2 and N=3, for the five-loop (N^4LO) non-singlet splitting functions.

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Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018)

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