Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: ERBL and DGLAP kernels for transversity distributions. Two-loop
  calculations in covariant gauge   The results of a two-loop calculation in the Feynman gauge of both the DGLAP
and the ERBL evolution kernels for transversely polarized distributions are
presented. The structure of these evolution kernels is discussed in detail. In
addition, the effect of the two-loop evolution on the distribution amplitude of
a twist-2 transversely polarized meson is explored.

26
The categories of this paper are: bayes-an
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The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
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The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: quant-ph
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The categories of this paper are: funct-an
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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: hep-lat
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The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: stat