Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: WILSON'S EXPANSION WITH POWER ACCURACY   Because of the infrared renormalons, it is difficult to get power accuracy in
the traditional approach to the Wilson's operator product expansion. Based on a
new perturbative renormalization scheme for power-divergent operators, I
propose a practical version of the OPE that allows to calculate power
corrections to desired accuracy. The method is applied to the expansion of the
vector-current correlation function in QCD vacuum, in which field theoretical
status of the gluon condensate is discussed.

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The categories of this paper are: acc-phys
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The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: chem-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: econ
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The categories of this paper are: patt-sol
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The categories of this paper are: nlin
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The categories of this paper are: cmp-lg
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: math-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: plasm-ph
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The categories of this paper are: quant-ph