QCD CORRECTIONS FROM THE TOP-QUARK TO RELATIONS BETWEEN ELECTROWEAK PARAMETERS UP TO ORDER ALPHA(2)(S)

被引：125

作者：

CHETYRKIN, KG

KUHN, JH

STEINHAUSER, M

机构：

[1] UNIV KARLSRUHE,INST THEORET TEILCHENPHYS,D-76128 KARLSRUHE,GERMANY

[2] STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.75.3394

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The vacuum polarization functions Pi(q(2)) of charged and neutral gauge bosons that arise from top and bottom quark loops lead to important shifts in relations between electroweak parameters that can be measured with ever-increasing precision. The large mass of the top quark allows approximation of these functions through the first two terms of an expansion in M(Z)(2)/M(t)(2). The first three terms of the Taylor series of Pi(q(2)), evaluated analytically up to order alpha(s)(2). Results for the subleading contributions to hr and the effective mixing angle sin(2)<(Theta)over bar> are presented.

引用

页码：3394 / 3397

页数：4

共 22 条

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