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A Complete Two-Loop, Five-Gluon Helicity Amplitude in Yang-Mills Theory

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arxiv 1507.08797 v2 pith:E5LKDPZE submitted 2015-07-31 hep-ph hep-th

classification hep-phhep-th
keywords amplitudecolourcutsfive-gluonfull-colourtheorytwo-loopyang-mills
verification ladder T0 review T1 audit T2 compute T3 formal
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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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