We present a method for the integrand-level reduction of two-loop helicity amplitudes in both d = 4 – 2ϵ and d = 4 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 HELAC-2LOOP, paves the road for the construction of an automated program for two-loop amplitude calculations for arbitrary scattering processes.
Bevilacqua, G., Canko, D., Papadopoulos, C.G., Spourdalakis, A. (2025). Towards numerical two-loop integrand reduction. JOURNAL OF HIGH ENERGY PHYSICS, 2025(11), 0-36 [10.1007/jhep11(2025)069].
Towards numerical two-loop integrand reduction
Canko, Dhimiter;
2025
Abstract
We present a method for the integrand-level reduction of two-loop helicity amplitudes in both d = 4 – 2ϵ and d = 4 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 HELAC-2LOOP, paves the road for the construction of an automated program for two-loop amplitude calculations for arbitrary scattering processes.| File | Dimensione | Formato | |
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