Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Universality of Hard-Loop Action   The effective actions of gauge bosons, fermions and scalars, which are
obtained within the hard-loop approximation, are shown to have unique forms for
a whole class of gauge theories including QED, scalar QED, super QED, pure
Yang-Mills, QCD, super Yang-Mills. The universality occurs irrespective of a
field content of each theory and of variety of specific interactions.
Consequently, the long-wavelength or semiclassical features of plasma systems
governed by these theories such as collective excitations are almost identical.
An origin of the universality, which holds within the limits of applicability
of the hard-loop approach, is discussed.

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The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat