Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Large-size expansion for triangular Wilson loops in confining gauge
  theories   The asymptotic behavior of Wilson loops in the large-size limit
($L\rightarrow\infty$) in confining gauge theories with area law is controlled
by effective string theory (EST). The $L^{-2}$ term of the large-size expansion
for the logarithm of Wilson loop appears within EST as a two-loop correction.
Ultraviolet divergences of this two-loop correction for polygonal contours can
be renormalized using an analytical regularization constructed in terms of
Schwarz-Christoffel mapping. In the case of triangular Wilson loops this method
leads to a simple final expression for the $L^{-2}$ term.

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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: nucl-th
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The categories of this paper are: q-bio
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
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The categories of this paper are: math-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: econ
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The categories of this paper are: atom-ph
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ph