Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The $O(g^4)$ Lipatov Kernels   Leading plus next-to leading log results for the Regge limit of massless
Yang-Mills theories are reproduced by reggeon diagrams in which the Regge slope
$\alpha' \to 0$ and reggeon amplitudes satisfy Ward identity constraints at
zero transverse momentum. Using reggeon unitarity together with multiple
discontinuity theory a complete set of such diagrams can be constructed. The
resulting two-two, one-three and two-four kernels which generalise the Lipatov
equation at $O(g^4)$ are determined uniquely.

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The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
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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: stat
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-ex
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The categories of this paper are: physics
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The categories of this paper are: nucl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: astro-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: adap-org
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ex