Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Wilson Coefficients in the Operator Product Expansion of Scalar Currents
  at Finite Temperature   In this paper, we investigate operator product expansion for thermal
correlation function of the two scalar currents. Due to breakdown of Lorentz
invariance at finite temperature, more operators of the same dimension appear
in the operator product expansion than at zero temperature. We calculated
Wilson coefficients in the short distance expansion and obtain operator product
expansion for thermal correlation function in terms of quark condensate, gluon
condensate, quark energy density and gluon energy density.

27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
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The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs