Determination of the QCD coupling αs

被引：171

作者：

Bethke, S ^{[1
]}

机构：

[1] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2000年 / 26卷 / 07期

关键词：

D O I：

10.1088/0954-3899/26/7/201

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Theoretical basics and experimental determinations of the coupling parameter of the strong interaction, alpha(s), are reviewed. The world average value of alpha(s), expressed at the energy scale of the rest mass of the Z(0) boson, is determined FI om analyses which are based on complete next-to-next-to-leading-order (NNLO) perturbative quantum chromodynamics (QCD). The result is alpha(s)(M-Z0) = 0.1184 +/- 0.0031. No significant deviations or systematic biases of subsamples of experimental results are found. From the observed energy dependence of alpha(s), which is in excellent agreement with the expectations of QCD, the number of colour degrees of freedom can be constrained to N-c = 3.03 +/- 0.12.

引用

页码：R27 / R66

页数：40

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