Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On-shell Recursion Relations for n-point QCD   We present on the use of on-shell recursion relations. These can be used not
only for calculating tree amplitudes, including those with masses, but also to
compute analytically the missing rational terms of one-loop QCD amplitudes.
Combined with the cut-containing pieces calculated using a unitarity approach
complete one-loop QCD amplitudes can be derived. This approach is discussed in
the context of the adjacent 2-minus all-multiplicity QCD gluon amplitude.

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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: chem-ph
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The categories of this paper are: math-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-lat
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The categories of this paper are: math
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The categories of this paper are: adap-org
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The categories of this paper are: hep-th
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The categories of this paper are: gr-qc
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The categories of this paper are: patt-sol
1
The categories of this paper are: cs
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The categories of this paper are: ao-sci