Infrared singularities in one-loop amplitudes
arXiv:1006.4609 · doi:10.1016/j.nuclphysbps.2010.08.047
Abstract
In this talk we discuss a purely numerical approach to next-to-leading order calculations in QCD. We present a simple formula, which provides a local infrared subtraction term for the integrand of a one-loop amplitude. In addition we briefly comment on local ultraviolet subtraction terms and on the required deformation of the contour of integration.
6 pages, talk given at the conference "Loops and Legs", Woerlitz, 2010
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- Integrands of loop amplitudes within loop-tree duality
- Decomposition of one-loop QCD amplitudes into primitive amplitudes based on shuffle relations
- Numerical integration of subtraction terms
- Does one need the O(epsilon)- and O(epsilon^2)-terms of one-loop amplitudes in an NNLO calculation ?
- On the vanishing of certain cuts or residues of loop integrals with higher powers of the propagators
- Random polarisations of the dipoles
- NLO corrections to Z production in association with several jets
- Numerical evaluation of NLO multiparton processes
- A new formulation of the loop-tree duality at higher loops