Towards numerical two-loop integrand reduction
arXiv:2506.07231
Abstract
We present a method for the integrand-level reduction of two-loop helicity amplitudes in both and dimensions. The amplitude is expressed in terms of a set of Feynman integrals and their coefficients that depend on the external kinematics. The analysis presented in this paper, in conjunction with the ongoing development of the computational framework , paves the road for the construction of an automated program for two-loop amplitude calculations for arbitrary scattering processes.
38 pages, 15 tables, 8 figures, accepted for publication in JHEP