Ward-Takahashi identity with an external field in ladder QED

被引：46

作者：

Ferrer, EJ ^{[1
]}

de la Incera, V ^{[1
]}

机构：

[1] SUNY Coll Fredonia, Dept Phys, Fredonia, NY 14063 USA

来源：

PHYSICAL REVIEW D | 1998年 / 58卷 / 06期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevD.58.065008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We derive the Ward-Takahashi identity obeyed by the fermion-antifermion-gauge boson vertex in ladder QED in the presence of a constant magnetic field. The general structure in momentum space of the fermion mass operator with an external electromagnetic field is discussed. Using it we find solutions of the ladder WT identity with a magnetic field. The consistency of our results with the solutions of the corresponding Schwinger-Dyson equation ensures the gauge invariance of the magnetic-field-induced chiral symmetry breaking recently found in ladder QED. [S0556-2821(98)04116-2].

引用

页数：8

共 38 条

[21] RG analysis of magnetic catalysis in dynamical symmetry breaking [J].