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

页码：540 / 550

页数：11

共 45 条

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