Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inclusive Dijet Production at HERA: Direct Photon Cross Sections in
  Next-To-Leading Order QCD   We have calculated inclusive two-jet cross sections in next-to-leading order
QCD for direct photoproduction in low $Q^2$ $ep$ collisions at HERA. Infrared
and collinear singularities in real and virtual contributions are cancelled
with the phase space slicing method. Analytical formulas for the different
contributions giving the dependence on the slicing parameter are presented.
Various one- and two-jet distributions have been computed demonstrating the
flexibility of the method.

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The categories of this paper are: nlin
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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: plasm-ph
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The categories of this paper are: math-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: chao-dyn
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The categories of this paper are: cmp-lg
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The categories of this paper are: quant-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
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The categories of this paper are: stat
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The categories of this paper are: eess
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The categories of this paper are: physics
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The categories of this paper are: nucl-ex