Gauge dependence of the infrared behaviour of massless QED3
Abstract
Using the Zumino identities it is shown that in a class of non-local gauges, massless QED3 has an infrared behaviour of a conformal field theory with a continuously varying anomalous dimension of the fermion. In the usual Lorentz gauge, the fermion propagator falls off exponentially for a large separation, but this apparent fermion mass is a gauge artifact.
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