GAUGE-INVARIANCE IN FINITE QED

被引：19
|
作者：
DUTSCH, M
KRAHE, F
SCHARF, G
机构：
[1] Institut für Theoretische Physik der Universität Zürich, Zürich, CH-8001
来源：
NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA A-NUCLEI PARTICLES AND FIELDS | 1990年 / 103卷 / 06期
关键词：
Electromagnetic and unified gauge fields; Field theory; PACS; 12.20;
D O I：
10.1007/BF02799235
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
Gauge invariance is discussed in the causal approach to QED. It is proven that the iterative construction of the S-matrix by the method of Epstein and Glaser can be carried out in such a way that perturbative gauge invariance holds true. The proof rests on a careful analysis of the process of distribution splitting. In case of nontrivial distribution splitting gauge invariance implies the Ward-Takahashi identities. © 1990 Società Italiana di Fisica.
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页码：903 / 925
页数：23
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