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A Two-Loop Four-Gluon Helicity Amplitude in QCD

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.

preprint2011arXivOpen access
Z. BernL. DixonD. A. Kosower
hep-phhep-th
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Z. BernL. DixonD. A. Kosower

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