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arXiv · hep-ph/0001001

A Two-Loop Four-Gluon Helicity Amplitude in QCD

Z. Bern·L. Dixon·D. A. Kosower
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Abstract

We present the two-loop pure gauge contribution to the gluon-gluon scattering amplitude with maximal helicity violation. Our construction of the amplitude does not rely directly on Feynman diagrams, but instead uses its analytic properties in 4 - 2 epsilon dimensions. We evaluate the loop integrals appearing in the amplitude through O(epsilon^0) in terms of polylogarithms.

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Z. Bern, L. Dixon, D. A. Kosower. 2011-06-24. A Two-Loop Four-Gluon Helicity Amplitude in QCD. https://doi.org/10.1088/1126-6708%2F2000%2F01%2F027

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