Gauge dependence of the infrared behaviour of massless QED_3

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

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High Energy Physics - Theory, High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/189433

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/hep-th/0510055
 http://arxiv.org/abs/hep-th/0510055
 Phys.Lett.B634:557-561,2006
 doi:10.1016/j.physletb.2006.02.016

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