Two-loop amplitude generation in OpenLoops
Abstract
Numerical tools, such as OpenLoops, provide NLO scattering amplitudes for a very wide range of hard scattering amplitudes in a fully automated way. In order to match the numerical precision of current and future experiments, however, the higher precision of NNLO calculations is essential, and their automation in a similar tool highly desirable. In our approach, D-dimensional amplitudes are decomposed into loop-momentum tensor integrals with coefficients constructed in four dimensions and rational terms. We present a fully generic algorithm for the efficient numerical construction of the tensor coefficients, which constitutes an important building block for an automated NNLO tool.
Cite
@article{arxiv.2202.00703,
title = {Two-loop amplitude generation in OpenLoops},
author = {Stefano Pozzorini and Natalie Schär and Max F. Zoller},
journal= {arXiv preprint arXiv:2202.00703},
year = {2022}
}
Comments
Contribution to the proceedings of the 15th International Symposium on Radiative Corrections: Applications of Quantum Field Theory to Phenomenology (RADCOR + LoopFest 2021); v2: Typos fixed, reference updated