Abstract
We compute the integrand of the full-colour, two-loop, five-gluon scattering amplitude in pure Yang-Mills theory with all helicities positive, using generalized unitarity cuts. Tree-level BCJ relations, satisfied by amplitudes appearing in the cuts, allow us to deduce all the necessary non-planar information for the full-colour amplitude from known planar data. We present our result in terms of irreducible numerators, with colour factors derived from the multi-peripheral colour decomposition. Finally, the leading soft divergences are checked to reproduce the expected infrared behaviour.
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Badger, S., Mogull, G., Ochirov, A. et al. A complete two-loop, five-gluon helicity amplitude in Yang-Mills theory. J. High Energ. Phys. 2015, 64 (2015). https://doi.org/10.1007/JHEP10(2015)064
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DOI: https://doi.org/10.1007/JHEP10(2015)064