LIGHT-CONE REGULAR VERTEX IN 3-DIMENSIONAL QUENCHED QED

被引:69
作者
BURDEN, CJ [1 ]
ROBERTS, CD [1 ]
机构
[1] ARGONNE NATL LAB, DIV PHYS, ARGONNE, IL 60439 USA
来源
PHYSICAL REVIEW D | 1991年 / 44卷 / 02期
关键词
D O I
10.1103/PhysRevD.44.540
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We study a model Schwinger-Dyson equation in three dimensions based on three-dimensional QED in the confining quenched approximation. We employ an ansatz for the dressed photon-fermion vertex function that does not have a singularity on the light cone. Our ansatz also allows us to study the relationship between the transverse part of the vertex and gauge independence of <psi-BAR-psi>. We find that the transverse part of the vertex is crucial to obtaining <psi-BAR-psi> independent of the gauge parameter. It modifies both the infrared and ultraviolet behavior of the fermion propagator without upsetting the 1/p2 behavior expected of the mass function at large spacelike p2.
引用
收藏
页码:540 / 550
页数:11
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