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JHEP11(2002)022 Published by Institute of Physics Publishing for SISSA/ISAS

Summary: JHEP11(2002)022
Published by Institute of Physics Publishing for SISSA/ISAS
Received: September 5, 2002
Revised: November 12, 2002
Accepted: November 13, 2002
Ward identity and electrical conductivity in hot QED
Gert Aarts and Jose M. Mart´inez Resco
Department of Physics, The Ohio State University
174 West 18th Avenue, Columbus, OH 43210, USA
Email: aarts@mps.ohio-state.edu, marej@pacific.mps.ohio-state.edu
Abstract: We study the Ward identity for the effective photon-electron vertex summing
the ladder diagrams contributing to the electrical conductivity in hot QED at leading
logarithmic order. It is shown that the Ward identity requires the inclusion of a new
diagram in the integral equation for the vertex that has not been considered before. The
real part of this diagram is subleading and therefore the final expressions for the electrical
conductivity at leading logarithmic order are not affected.
Keywords: Gauge Symmetry, Thermal Field Theory.
c SISSA/ISAS 2002 http://jhep.sissa.it/archive/papers/jhep112002022/jhep112002022.pdf


Source: Aarts, Gert - Department of Physics, University of Wales Swansea


Collections: Physics