Mass singularity in QED3
Y. Hoshino
Abstract
We determine the position space fermion propagator in three dimensional QED based on Ward-identity and spectral representation.There is a new type of mass singularity which governs the long distance behaviour.It leads the propagator vanish at large distance more stongly than the mass term does.This term corresponds to Dynamical mass.Momentum space proagator is compared with the analysis of Schwinger-Dyson equation and our solution contains a non-perubative effects beyond the quenched approximation with bare vertex.
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