Three-Point Spectral Density in QED and the Ward Identity at Finite Temperature
Defu, Hou · Heinz, U.
Original · EN
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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