Nonfactorizable QCD and electroweak corrections to the hadronic Z boson decay rate

被引：84

作者：

Czarnecki, A

Kuhn, JH

机构：

[1] Institut für Theoretische Teilchenphysik, Universität Karlsruhe, Karlsruhe

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.77.3955

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present an analysis of two-loop mixed QCD and electroweak corrections to the decay of the Z boson into light quarks. We find that the naive factorization of QCD and electroweak corrections does not describe correctly the two-loop effects. The nonfactorizable corrections shift the width of the Z boson by approximately -0.59(3) MeV and increase the central value of the strong coupling constant determined at the CERN e(+)e(-) collider LEP by 0.001.

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页码：3955 / 3958

页数：4

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