Gauge dependence of the infrared behaviour of massless QED_3

Details Gauge dependence of the infrared behaviour of massless QED_3 Gauge dependence of the infrared behaviour of massless QED_3

2005-10-06

arxiv.org/abs/hep-th/0510055v3

Phys.Lett.B634:557-561,2006

Physics

High Energy Physics

High Energy Physics - Theory

10 pages; changes made mainly to clarify the result in the usual Lorentz gauge; to appear in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2006.02.016

Using the Zumino identities it is shown that in a class of non-local gauges,
massless QED_3 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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