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arXiv · hep-ph/9805385

One-particle and collective electron spectra in hot and dense QED and their gauge dependence

O. K. Kalashnikov
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Abstract

The one-particle electron spectrum is found for hot and dense QED and its properties are investigated in comparison with the collective spectrum. It is shown that the one-particle spectrum (in any case its zero momentum limit) is gauge invariant, but the collective spectrum, being qualitatively different, is always gauge dependent. The exception is the case $m,μ=0$ for which the collective spectrum long wavelength limit demonstrates the gauge invariance as well.

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O. K. Kalashnikov. 1998-05-20. One-particle and collective electron spectra in hot and dense QED and their gauge dependence. https://doi.org/10.1142/s0217732398001790

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