Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Photon and electron spectra in hot and dense QED   Photon and electron spectra in hot and dense QED are found in the high
temperature limit for all $|\q|$ using the Feynman gauge and the one-loop
self-energy. All spectra are split by the medium and their branches develop the
gap (the dynamical mass) at zero momentum. The photon spectrum has two branches
(longitudinal and transverse) with the common mass; but electron spectrum is
split on four branches which are well-separated for any $|\q|$ including their
$|\q|=0$ limits (their effective masses). These masses and the photon thermal
mass are calculated explicitly and the different limits of spectrum branches
are established in detail. The gauge invariance of the high-temperature spectra
is briefly discussed.

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The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
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The categories of this paper are: alg-geom
1
The categories of this paper are: cs
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The categories of this paper are: dg-ga
2
The categories of this paper are: math
19
The categories of this paper are: eess