arXiv:hep-th/9801103·v2·High Energy Physics — Theory
Ward Identities in Non-equilibrium QED
M.E. Carrington🇨🇦 · Hou Defu🇩🇪 · Markus H. Thoma🇩🇪
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.
Comments: 19 pages, RevTex, 4 PostScript figures, revised version to be published in Phys. Rev. D