https://doi.org/10.1140/epjc/s10052-021-09204-7
Special Article - Tools for Experiment and Theory
Speeding up MadGraph5_aMC@NLO
1
Center for Cosmology, Particle Physics and Phenomenology (CP3), Université Catholique de Louvain (UCLouvain), 1348, Louvain-la-Neuve, Belgium
2
Centre de Calcul Intensif et de Stockage de Masse, Université Catholique de Louvain (UCLouvain), 1348, Louvain-la-Neuve, Belgium
3
University of Manchester, School of Physics and Astronomy, Schuster Building, Oxford Road, M13 9PL, Manchester, UK
a
olivier.mattelaer@uclouvain.be
Received:
19
February
2021
Accepted:
2
May
2021
Published online:
20
May
2021
In this paper we will describe two new optimisations implemented in MadGraph5_aMC@NLO, both of which are designed to speed-up the computation of leading-order processes (for any model). First we implement a new method to evaluate the squared matrix element, dubbed helicity recycling, which results in factor of two speed-up. Second, we have modified the multi-channel handling of the phase-space integrator providing tremendous speed-up for VBF-like processes (up to thousands times faster).
Supplementary Information The online version contains supplementary material available at https://doi.org/10.1140/epjc/s10052-021-09204-7.
© The Author(s) 2021
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