Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Power corrections and gradient expansion in QED transport theory   The hard thermal loop (HTL) effective field theory of QED can be derived from
the classical limit of transport theory, corresponding to the leading term in a
gradient expansion of the quantum approach. In this paper, we show that power
corrections to the HTL effective Lagrangian of QED can also be obtained from
transport theory by including higher orders in such gradient expansion. The
gradient expansion is increasingly infrared (IR) divergent, but the correction
that we compute is IR finite. We employ dimensional regularization, and show
that this result comes after a cancellation of divergencies between the vacuum
and medium contributions. While the transport framework is an effective field
theory of the long distance physics of the plasma, we show that it correctly
reproduces the correct QED ultraviolet divergencies associated with the photon
wave function renormalization.

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The categories of this paper are: alg-geom
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
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The categories of this paper are: chem-ph
18
The categories of this paper are: econ
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The categories of this paper are: eess
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat