Abstract
Real and virtual corrections in NNLO QCD require multi-dimensional integrals with overlapping singularities. We first review ideas and methods which have been proposed for performing such computations. We then present a new method for the factorization of overlapping singularities based on non-linear integral transformations. We apply this method for the evaluation of all integral topologies which appear in double real radiation corrections in cross-section calculations for the production of a heavy system at hadron colliders. Finally, we demonstrate with typical examples that two-loop virtual corrections are amenable to the same method.
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ArXiv ePrint: 1011.4867
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Anastasiou, C., Herzog, F. & Lazopoulos, A. On the factorization of overlapping singularities at NNLO. J. High Energ. Phys. 2011, 38 (2011). https://doi.org/10.1007/JHEP03(2011)038
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DOI: https://doi.org/10.1007/JHEP03(2011)038