Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonperturbative Effects in Event Shapes from Soft-Collinear Effective
  Theory   Soft-collinear effective theory (SCET) is used to demonstrate factorization
for event shape distributions in the two-jet region. The leading
nonperturbative power corrections to these distributions can be characterized
as shape functions defined in terms of Wilson lines of soft gluons. The
relation of these results to the well-known predictions for shifts in the
distributions induced by the leading power corrections is discussed.

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The categories of this paper are: gr-qc
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The categories of this paper are: q-bio
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The categories of this paper are: cs
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The categories of this paper are: mtrl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-th
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The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
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The categories of this paper are: adap-org
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The categories of this paper are: physics
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The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: stat
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The categories of this paper are: q-fin
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The categories of this paper are: q-alg