Chiral Symmetry Breaking with the Curtis-Pennington Vertex
classification
✦ hep-th
keywords
breakingchiralsymmetryvertexagreementanalysisansatzapproximation
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We study chiral symmetry breaking in quenched QED$_4$, using a vertex Ansatz recently proposed by Curtis and Pennington. Bifurcation analysis is employed to establish the existence of a critical coupling and to estimate its value. The main results are in qualitative agreement with the ladder approximation, the numerical changes being minor.
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