Strong coupling constant with flavor thresholds at four loops in the modified minimal-subtraction scheme

被引：318

作者：

Chetyrkin, KG ^{[1
]}

Kniehl, BA ^{[1
]}

Steinhauser, M ^{[1
]}

机构：

[1] MAX PLANCK INST PHYS & ASTROPHYS,WERNER HEISENBERG INST,D-80805 MUNICH,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.79.2184

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present in analytic form the matching conditions for the strong coupling constant alpha(s)((nf))(mu) at the flavor thresholds to three loops in the modified minimal-subtraction scheme. Taking into account the recently calculated coefficient beta(3) Of the Callan-Symanzik beta function of quantum chromodynamics, we thus derive a four-loop formula for alpha(s)((nf))(mu) together with appropriate relationships between the asymptotic scale parameters Lambda((nf)) for different numbers of flavors n(f).

引用

页码：2184 / 2187

页数：4

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