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arXiv · 1409.5979

Dynamical mass generation in unquenched QED using the Dyson--Schwinger equations

Ayse Kizilersu·Michael R. Pennington·Tom Sizer·Anthony G. Williams·Richard Williams
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Abstract

We present a comprehensive numerical study of dynamical mass generation for unquenched QED in four dimensions, in the absence of four-fermion interactions, using the Dyson--Schwinger approach. We begin with an overview of previous investigations of criticality in the quenched approximation. To this we add an analysis using a new fermion-antifermion-boson interaction ansatz, the Kizilersu-Pennington (KP) vertex, developed for an unquenched treatment. After surveying criticality in previous unquenched studies, we investigate the performance of the KP vertex in dynamical mass generation using a renormalized fully unquenched system of equations. This we compare with the results for two hybrid vertices incorporating the Curtis--Pennington vertex in the fermion equation. We conclude that the KP vertex is as yet incomplete, and its relative gauge-variance is due to its lack of massive transverse components in its design.

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Ayse Kizilersu, Michael R. Pennington, Tom Sizer, Anthony G. Williams, Richard Williams. 2014-09-21. Dynamical mass generation in unquenched QED using the Dyson--Schwinger equations. https://arxiv.org/abs/1409.5979

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