Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Moments of the 3--loop corrections to the heavy flavor contribution to
  $F_2(x,Q^2)$ for $Q^2\gg m^2$   We calculate moments of the $O(\alpha_s^3)$ heavy flavor contributions to the
  Wilson coefficients of the structure function $F_2(x,Q^2)$ in the region
  $Q^2\gg m^2$. The massive Wilson coefficients are obtained as convolutions of
massive operator matrix elements (OMEs) and the known light flavor Wilson
coefficients. The calculation of moments of the massive OMEs involves a first
independent recalculation of moments of the fermionic contributions to all
3--loop anomalous dimensions of the unpolarized twist--2 local composite
operators stemming from the light--cone expansion \cite{url}.

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The categories of this paper are: math
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The categories of this paper are: nlin
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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: math-ph
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The categories of this paper are: econ
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The categories of this paper are: acc-phys
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The categories of this paper are: comp-gas
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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: solv-int
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-th
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The categories of this paper are: cs
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The categories of this paper are: astro-ph