Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: NLO Corrections to the Photon Impact Factor: Combining Real and Virtual
  Corrections   In this third part of our calculation of the QCD NLO corrections to the
photon impact factor we combine our previous results for the real corrections
with the singular pieces of the virtual corrections and present finite analytic
expressions for the quark-antiquark-gluon intermediate state inside the photon
impact factor. We begin with a list of the infrared singular pieces of the
virtual correction, obtained in the first step of our program. We then list the
complete results for the real corrections (longitudinal and transverse photon
polarization). In the next step we define, for the real corrections, the
collinear and soft singular regions and calculate their contributions to the
impact factor. We then subtract the contribution due to the central region.
Finally, we combine the real corrections with the singular pieces of the
virtual corrections and obtain our finite results.

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The categories of this paper are: dg-ga
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The categories of this paper are: math-ph
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The categories of this paper are: nlin
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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: econ
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The categories of this paper are: ao-sci
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The categories of this paper are: comp-gas
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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: q-bio
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The categories of this paper are: funct-an
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The categories of this paper are: q-alg
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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: adap-org