Renormalization and chiral symmetry breaking in quenched QED in arbitrary covariant gauges

Journal Article · Tue Oct 01 04:00:00 EDT 1996 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.54.5361· OSTI ID:390407

Hawes, F T ^[1]; Williams, A G ^[2]; Roberts, C D ^[3]

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1. Department of Physics and SCRI, Florida State University, Tallahassee, Florida 32306-3016 (United States)
2. Institute for Theoretical Physics and Department of Physics and Mathematical Physics, University of Adelaide, 5005 (Australia)
3. Physics Division, Argonne National Laboratory, Argonne, Illinois 60439-4843 (United States)

We extend a previous Landau-gauge study of subtractive renormalization of the fermion propagator Dyson-Schwinger equation in strong-coupling, quenched four-dimensional QED to {ital arbitrary} covariant gauges. We use the fermion-photon proper vertex proposed by Curtis and Pennington with an additional correction term included to compensate for the small gauge dependence induced by the ultraviolet regulator. We discuss the chiral limit and the onset of dynamical chiral symmetry breaking in the presence of nonperturbative renormalization. We extract the critical coupling in several different gauges and find evidence of a small residual gauge dependence in this quantity. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Florida State University
• DOE Contract Number: FG05-85ER25000; FG05-86ER40273; W-31109-ENG-38
• OSTI ID: 390407
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 8 Vol. 54; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CHIRAL SYMMETRY
FERMIONS
FOUR-DIMENSIONAL CALCULATIONS
PROPAGATOR
QUANTUM ELECTRODYNAMICS
RENORMALIZATION
SCHWINGER FUNCTIONAL EQUATIONS
SYMMETRY BREAKING