Modelling and computational improvements to the simulation of single vector-boson plus jet processes for the ATLAS experiment

ATLAS Publications, T.M. Carter, R.Y. Gonzalez Andana, A. Hasib, M.P. Heath, S. Palazzo, V.A. Parrish, E.P. Takeva, N. Themistokleous, E.M. Villhauer, E. Zaid

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

This paper presents updated Monte Carlo configurations used to model the
production of single electroweak vector bosons (W , Z/γ∗) in association with jets in proton-proton collisions for the ATLAS experiment at the Large Hadron Collider. Improvements pertaining to the electroweak input scheme, parton-shower splitting kernels and scale-setting scheme are shown for multi-jet merged configurations accurate to next-to-leading order in the strong and electroweak couplings. The computational resources required for these set-ups are assessed, and approximations are introduced resulting in a factor three
reduction of the per-event CPU time without affecting the physics modelling performance. Continuous statistical enhancement techniques are introduced by ATLAS in order to populate low cross-section regions of phase space and are shown to match or exceed the generated effective luminosity. This, together with the lower per-event CPU time, results in a 50% reduction in the required computing resources compared to a legacy set-up previously used by the ATLAS collaboration. The set-ups described in this paper will be used for future ATLAS analyses and lay the foundation for the next generation of Monte Carlo
predictions for single vector-boson plus jets production.
Original languageEnglish
Article number89
Pages (from-to)1-59
Number of pages59
Journal Journal of High Energy Physics
Volume2022
Issue number8
DOIs
Publication statusPublished - 5 Aug 2022

Keywords / Materials (for Non-textual outputs)

  • Hadron-Hadron Scattering

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