Speeding up MadGraph5_aMC@NLO

Mattelaer, Olivier;Ostrolenk, Kiran
(2021) The European Physical Journal C — Vol. 81, n° 5, p. 123 (2021)

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In this paper we will describe two new optimi-sations implemented inMadGraph5_aMC@NLO, both ofwhich are designed to speed-up the computation of leading-order processes (for any model). First we implement a newmethod to evaluate the squared matrix element, dubbed helic-ity 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-likeprocesses (up to thousands times faster).
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Mattelaer, O., & Ostrolenk, K. (2021). Speeding up MadGraph5_aMC@NLO. The European Physical Journal C, 81(5), 123. https://doi.org/10.1140/epjc/s10052-021-09204-7 (Original work published 2021)