The Non-perturbative Three-point Vertex in Massless Quenched Qed and Perturbation Theory

@inproceedings{BashirTheNT,
title={The Non-perturbative Three-point Vertex in Massless Quenched Qed and Perturbation Theory},
author={A. F. Bashir and A. Kızılers{\"u} and Michael R. Pennington}
}

Dong, Munczek and Roberts [1] have shown how the full 3-point vertex that appears in the Schwinger-Dyson equation for the fermion propagator can be expressed in terms of a constrained function W 1 in massless quenched QED. However, this analysis involved two key assumptions : that the fermion anomalous dimension vanishes in the Landau gauge and that the transverse vertex has a simplified dependence on momenta. Here we remove these assumptions and find the general form for a new constrained… CONTINUE READING