Five-loop vacuum polarization in pQCD:: O(mq2αs4nf2) contribution

被引：17

作者：

Baikov, PA ^{[1
]}

Chetyrkin, KG

Kühn, JH

机构：

[1] Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow 119992, Russia

[2] Univ Freiburg, Fak Phys, D-79104 Freiburg, Germany

[3] Univ Karlsruhe, Inst Theoret Teilchenphys, D-76128 Karlsruhe, Germany

来源：

PHYSICS LETTERS B | 2003年 / 559卷 / 3-4期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1016/S0370-2693(03)00186-2

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the analytical calculation of the contribution of order m(q)(2)alpha(s)(4)n(f)(2) to the absorptive part of the vacuum polarization function of vector cuffents. This term constitutes an important gauge-invariant part of the full O(m(q)(2)alpha(s)(4)) coffection to the total cross-section of e(+)e(-) annihilation into hadrons. The results are compared to predictions following from various optimization schemes. (C) 2003 Published by Elsevier Science B.V.

引用

页码：245 / 251

页数：7

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