Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $\gamma^* \gamma^*$ Cross Section at NLO and Properties of the BFKL
  Evolution at Higher Orders   We obtain a simple analytic expression for the high energy $\gamma^*
\gamma^*$ scattering cross section at the next-to-leading order in the
logarithms-of-energy power counting. To this end we employ the eigenfunctions
of the NLO BFKL equation constructed in our previous paper. We also construct
the eigenfunctions of the NNLO BFKL kernel and obtain a general form of the
solution for the NNLO BFKL equation, which confirms the ansatz proposed in our
previous paper.

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The categories of this paper are: cs
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The categories of this paper are: math-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
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The categories of this paper are: mtrl-th
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The categories of this paper are: physics
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The categories of this paper are: hep-lat
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The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: eess
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The categories of this paper are: patt-sol
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The categories of this paper are: q-bio
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The categories of this paper are: bayes-an
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The categories of this paper are: gr-qc
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The categories of this paper are: solv-int