Strongly-Coupled Unquenched QED4 Propagators Using Schwinger-Dyson Equations
High Energy Physics - Phenomenology
2013-10-14 v1 High Energy Physics - Theory
Abstract
We study unquenched QED in four dimensions using renormalised Schwinger-Dyson equations and focus on the behaviour of the fermion and photon propagators. For this purpose we use an improved Kizilersu-Pennington (KP) vertex which respects gauge invariance, multiplicative renormalizability for the massless case, agrees with perturbation theory in the weak coupling regime and is free of kinematic singularities. We find that the KP vertex performs very well as expected specially in comparison with other vertex choices. We find that the Landau pole problem familiar from perturbative QED persists in the nonperturbative case with the renormalised inverse photon propagator having zero crossing.
Cite
@article{arxiv.1310.3160,
title = {Strongly-Coupled Unquenched QED4 Propagators Using Schwinger-Dyson Equations},
author = {Ayse Kizilersu and Tom Sizer and Anthony G. Williams},
journal= {arXiv preprint arXiv:1310.3160},
year = {2013}
}
Comments
48 pages, 19 figures