Multi-leg One-loop Massive Amplitudes from Integrand Reduction via Laurent Expansion

Abstract

We present the application of a novel reduction technique for one-loop scattering amplitudes based on the combination of the integrand reduction and Laurent expansion. We describe the general features of its implementation in the computer code NINJA, and its interface to GoSam. We apply the new reduction to a series of selected processes involving massive particles, from six to eight legs.

Comments: v3: 39 pages, minor typos and one benchmark point corrected