We compute the planar part of the two-loop five gluon amplitude with all helicities positive. To perform the calculation we develop a D-dimensional generalized unitarity procedure allowing us to reconstruct the amplitude by cutting into products of six-dimensional trees. We find a compact form for the integrand which only requires topologies with six or more propagators. We perform cross checks of the universal infra-red structure using numerical integration techniques.
@article{arxiv.1310.1051,
title = {A Two-Loop Five-Gluon Helicity Amplitude in QCD},
author = {Simon Badger and Hjalte Frellesvig and Yang Zhang},
journal= {arXiv preprint arXiv:1310.1051},
year = {2015}
}
Comments
31 pages, 7 figures. version 2 - fix typos and match with journal version