Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bootstrapping Null Polygon Wilson Loops   We derive the two loop expressions for polygonal Wilson loops by starting
from the one loop expressions and applying an operator product expansion. We do
this for polygonal Wilson loops in R^{1,1} and find a result in agreement with
previous computations. We also discuss the spectrum of excitations around flux
tube that connects two null Wilson lines.

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The categories of this paper are: gr-qc
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The categories of this paper are: econ
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The categories of this paper are: hep-lat
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The categories of this paper are: patt-sol
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The categories of this paper are: mtrl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: plasm-ph
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The categories of this paper are: math
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The categories of this paper are: funct-an
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The categories of this paper are: solv-int
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The categories of this paper are: bayes-an
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The categories of this paper are: stat
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The categories of this paper are: hep-ex
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The categories of this paper are: cond-mat
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The categories of this paper are: q-bio
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The categories of this paper are: q-alg