Five-Loop Running of the QCD Coupling Constant
Five-Loop Running of the QCD Coupling Constant
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DOI：
10.1103/physrevlett.118.082002
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发表时间：
2017-02-24
影响因子：
8.6
通讯作者：
Kuehn, J. H.
中科院分区：
文献类型：
--
作者：
Baikov, P. A.;Chetyrkin, K. G.;Kuehn, J. H.
我们解析地计算了β函数中的五圈项，它决定了QCD中夸克-胶子耦合常数的运行。新的长期导致减少的理论不确定性，在采取的Z玻色子尺度提取的t轻子衰变，以及新的，改进了一个多阶的微扰理论，预测的有效耦合常数的标准模型希格斯玻色子胶子和其总衰变率的夸克反夸克对。
We analytically compute the five-loop term in the beta function which governs the running of as-the quark-gluon coupling constant in QCD. The new term leads to a reduction of the theory uncertainty in as taken at the Z-boson scale as extracted from the t-lepton decays as well as to new, improved by one more order of perturbation theory, predictions for the effective coupling constants of the standard model Higgs boson to gluons and for its total decay rate to the quark-antiquark pairs.