Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Power Corrections to Fragmentation Functions in Flavour-Singlet Deep
  Inelastic Scattering   We investigate the power-suppressed corrections to fragmentation functions in
flavour-singlet deep inelastic lepton scattering, to complement the previous
results for the non-singlet contribution. Our method is a dispersive approach
based on an analysis of Feynman graphs containing massive gluons. As in
non-singlet deep inelastic scattering we find that the leading corrections are
proportional to 1/Q^2.

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The categories of this paper are: math
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The categories of this paper are: atom-ph
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The categories of this paper are: supr-con
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The categories of this paper are: plasm-ph
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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: nucl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-lat
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The categories of this paper are: q-fin
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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
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The categories of this paper are: gr-qc
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The categories of this paper are: eess