Chiral Symmetry Breaking with the Curtis-Pennington Vertex

Physics – High Energy Physics – High Energy Physics - Theory

Scientific paper

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19 pages, LaTeX

Scientific paper

10.1016/0370-2693(93)90061-L

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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