Behaviour of the absorptive part of the W-+/- electromagnetic vertex

被引：30

作者：

Beuthe, M ^{[1
]}

Felipe, RG ^{[1
]}

Castro, GL ^{[1
]}

Pestieau, J ^{[1
]}

机构：

[1] INST POLITECN NACL,CTR INVEST & ESTUDIOS AVANZADOS,DEPT FIS,MEXICO CITY 07000,DF,MEXICO

来源：

NUCLEAR PHYSICS B | 1997年 / 498卷 / 1-2期

关键词：

absorptive; unstable; bosons; axial;

D O I：

10.1016/S0550-3213(97)00263-0

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：

The absorptive part of the WW gamma vertex induced by massive fermion loops is considered for different kinematical configurations. We show that the axial part of this vertex is different from zero not only when massive fermions are involved but also for massless fermion loops, if one of the W bosons is space-like and the other is time-like. We also discuss in what sense Low's soft photon theorem is satisfied. (C) 1997 Elsevier Science B.V.

引用

页码：55 / 67

页数：13