Five-loop contributions to low-N non-singlet anomalous dimensions in QCD
Five-loop contributions to low-N non-singlet anomalous dimensions in QCD
复制标题
五环对 QCD 中低 N 非单态反常维度的贡献
DOI:
10.1016/j.physletb.2019.01.060
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发表时间:
2019
影响因子:
4.4
通讯作者:
A. Vogt
中科院分区:
文献类型:
--
作者:
F. Herzog;S. Moch;B. Ruijl;T. Ueda;J.A.M. Vermaseren;A. Vogt
We present the first calculations of next-to-next-to-next-to-next-to-leading order (N 4 LO) contributions to anomalous dimensions of spin-N twist-2 operators in perturbative QCD. Specifically, we have obtained the respective non-singlet quark–quark anomalous dimensions at N= 2 and N= 3 to the fifth order in the strong coupling α s. These results set the scale for the N 4 LO contributions to the evolution of the non-singlet quark distributions of hadrons outside the small-x region, and facilitate a first approximate determination of the five-loop cusp anomalous dimension. While the N 4 LO coefficients are larger than expected from the lower-order results, their inclusion stabilizes the perturbative expansions for three or more light flavours at a sub-percent accuracy for α s< 0.3.
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影响因子:
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作者:
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通讯作者:
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DOI:
10.1016/j.nuclphysb.2016.12.012
发表时间:
2016
期刊:
Nuclear Physics
影响因子:
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DOI:
10.22323/1.303.0050
发表时间:
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期刊:
Proceedings of Loops and Legs in Quantum Field Theory — PoS(LL2018)
影响因子:
--
作者:
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通讯作者:
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DOI:
10.1016/j.nuclphysb.2012.03.006
发表时间:
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Nuclear Physics
影响因子:
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