2-LOOP QED VERTEX CORRECTION FROM VIRTUAL HEAVY FERMIONS

被引：48

作者：

KNIEHL, BA

机构：

[1] Department of Physics, University of Wisconsin, Madison

来源：

PHYSICS LETTERS B | 1990年 / 237卷 / 01期

关键词：

D O I：

10.1016/0370-2693(90)90474-K

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The O(α2) contribution of a virtual massive fermion to the electromagnetic vertex of a light fermion is calculated in perturbative QED for arbitrary external momentum transfer s. Besides the exact analytic result also the small-s and high-s expansions are presented. Virtual fermions with masses m≫ |s| decouple from the effective interaction of light fermions and photons. © 1990.

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页码：127 / 129

页数：3

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