Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The (gamma^*-q\bar q)-Reggeon Vertex in Next-to-Leading Order QCD   As a first step towards the computation of the NLO corrections to the photon
impact factor in the $\gamma^*\gamma^* \to \gamma^* \gamma^*$ scattering
process, we calculate the one loop corrections to the coupling of the reggeized
gluon to the $\gamma^*\to q\bar{q}$ vertex. We list the results for the Feynman
diagrams which contribute: all loop integrations are carried out, and the
results are presented in the helicity basis of photon, quark, and antiquark.

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The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
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The categories of this paper are: nlin
7
The categories of this paper are: hep-th
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The categories of this paper are: dg-ga
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The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc