2018 Impact factor 4.843
Particles and Fields
Eur. Phys. J. C 7, 101-106
DOI 10.1007/s100529800984

Three-point spectral density in QED and the ward identity
at finite temperature

D. Hou1,2 - U. Heinz1

1 Institut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany
2 Institute of Particle Physics, Hua-Zhong Normal University, 430079 Wuhan, P.R. China
(e-mail: defu.hou@rphs1.physik.uni-regensburg.de)

Received: 12 March 1998 / Published online: 21 September 1998

Abstract
We derive the spectral representations of QED 3-point functions and then explicitly calculate the 3-point spectral densities in hard thermal loop approximation within the real time formalism. The Ward identities obeyed by the retarded and advanced 2- and 3-point functions are discussed. We compare our results with those for hot QCD.


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