Dynamical chiral symmetry breaking and the fermion-gauge-boson vertex

被引：81
|
作者：
Bashir, A. [1 ,2 ,3 ]
Bermudez, R. [1 ]
Chang, L. [2 ]
Roberts, C. D. [2 ,4 ]
机构：
[1] Univ Michoacana, Inst Fis & Matemat, Morelia 58040, Michoacan, Mexico
[2] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA
[3] Kent State Univ, Dept Phys, Ctr Nucl Res, Kent, OH 44242 USA
[4] IIT, Dept Phys, Chicago, IL 60616 USA
来源：
PHYSICAL REVIEW C | 2012年 / 85卷 / 04期
基金：
美国国家科学基金会;
关键词：
SCHWINGER-DYSON; VACUUM POLARIZATION; 3-POINT VERTEX; QED VERTEX; PROPAGATOR; CONFINEMENT; EQUATIONS; THEOREM; MASS;
D O I：
10.1103/PhysRevC.85.045205
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We present a workable model for the fermion-photon vertex, which is expressed solely in terms of functions that appear in the fermion propagator and independent of the angle between the relative momenta, and does not explicitly depend on the covariant-gauge parameter. It nevertheless produces a critical coupling for dynamical chiral symmetry breaking that is practically independent of the covariant-gauge parameter and an anomalous magnetic moment distribution for the dressed fermion that agrees in important respects with realistic numerical solutions of the inhomogeneous vector Bethe-Salpeter equation.
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页数：7
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