Ward Identities in Non-equilibrium QED

Abstract

We verify the QED Ward identity for the two- and three -point functions at non-equilibrium in the HTL limit. We use the Keldysh formalism of real time finite temperature field theory. We obtain an identity of the same form as the Ward identity for a set of one loop self-energy and one loop three-point vertex diagrams which are constructed from HTL effective propagators and vertices.

19 pages, RevTex, 4 PostScript figures, revised version to be published in Phys. Rev. D

References in corpus (1)

• Three-Point Functions at Finite Temperature

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