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Scientific article
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English

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

ContributorsATLAS Collaboration
Published inThe journal of high energy physics, vol. 2022, no. 8, 89
Publication date2022
First online date2022-08-05
Abstract

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.

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Keywords
  • Hadron-Hadron Scattering
  • Perturbation theory: higher-order
  • Higher-order: 1
  • Jet: associated production
  • Model: production
  • P p: scattering
  • ATLAS
  • Vector boson: hadroproduction
  • Electroweak interaction
  • Quantum chromodynamics: perturbation theory
  • Numerical calculations: Monte Carlo
  • Splitting
  • Parton: showers
  • CERN LHC Coll
  • Enhancement
  • Statistical analysis
  • Performance
  • Phase space
  • Data analysis method
Citation (ISO format)
ATLAS Collaboration. Modelling and computational improvements to the simulation of single vector-boson plus jet processes for the ATLAS experiment. In: The journal of high energy physics, 2022, vol. 2022, n° 8, p. 89. doi: 10.1007/jhep08(2022)089
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ISSN of the journal1029-8479
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