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Type: Journal article
Title: Strongly-coupled unquenched QED₄ propagators using Schwinger-Dyson equations
Other Titles: Strongly-coupled unquenched QED(4) propagators using Schwinger-Dyson equations
Author: Kizilersu, A.
Sizer, T.
Williams, A.
Citation: Physical Review. D. Particles, Fields, Gravitation and Cosmology, 2013; 88(4):1-48
Publisher: American Physical Society
Issue Date: 2013
ISSN: 1550-7998
Statement of
Ayşe Kızılersü, Tom Sizer, and Anthony G. Williams
Abstract: We study unquenched QED in four dimensions using renormalized Schwinger-Dyson equations and focus on the behaviour of the fermion and photon propagators. For this purpose we use an improved Kızılersü-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 especially in comparison with other vertex choices. We find that the Landau pole problem familiar from perturbative QED persists in the nonperturbative case with the renormalized inverse photon propagator having zero crossing.
Rights: © 2013 American Physical Society
RMID: 0020131436
DOI: 10.1103/PhysRevD.88.045008
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Appears in Collections:Chemistry and Physics publications

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