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Speeding up MadGraph5_aMC@NLO
O Mattelaer1,2, K Ostrolenk1,3
1Center for Cosmology, Particle Physics and Phenomenology (CP3), Université Catholique de Louvain (UCLouvain), 1348 Louvain-la-Neuve, Belgium.
Abstract:
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 10.1140/epjc/s10052-021-09204-7.
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