Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Renormalons and Power Corrections   Even for short-distance dominated observables the QCD perturbation expansion
is never complete. The divergence of the expansion through infrared renormalons
provides formal evidence of this fact. In this article we review how this
apparent failure can be turned into a useful tool to investigate power
corrections to hard processes in QCD.

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The categories of this paper are: astro-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: quant-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: eess
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The categories of this paper are: nlin
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The categories of this paper are: hep-lat
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The categories of this paper are: stat
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The categories of this paper are: q-bio
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The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
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The categories of this paper are: chao-dyn
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The categories of this paper are: gr-qc
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The categories of this paper are: adap-org