Loop Amplitudes in Pure Yang-Mills from Generalised Unitarity

Details Loop Amplitudes in Pure Yang-Mills from Generalised Unitarity Loop Amplitudes in Pure Yang-Mills from Generalised Unitarity

2005-06-09

arxiv.org/abs/hep-th/0506068v1

JHEP0510:011,2005

Physics

High Energy Physics

High Energy Physics - Theory

35 pages, 10 figures

Scientific paper

10.1088/1126-6708/2005/10/011

We show how generalised unitarity cuts in D = 4 - 2 epsilon dimensions can be used to calculate efficiently complete one-loop scattering amplitudes in non-supersymmetric Yang-Mills theory. This approach naturally generates the rational terms in the amplitudes, as well as the cut-constructible parts. We test the validity of our method by re-deriving the one-loop ++++, -+++, --++, -+-+ and +++++ gluon scattering amplitudes using generalised quadruple cuts and triple cuts in D dimensions.

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