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



Aad, G, Abbott, B, Abbott, DC, Abud, A Abed, Abeling, K, Abhayasinghe, DK, Abidi, SH, Aboulhorma, A, Abramowicz, H, Abreu, H
et al (show 2850 more authors) (2022) Modelling and computational improvements to the simulation of single vector-boson plus jet processes for the ATLAS experiment. JOURNAL OF HIGH ENERGY PHYSICS, 2022 (8). 89-.

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>This paper presents updated Monte Carlo configurations used to model the production of single electroweak vector bosons (<jats:italic>W</jats:italic>, <jats:italic>Z/γ</jats:italic><jats:sup>∗</jats:sup>) 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.</jats:p>

Item Type: Article
Uncontrolled Keywords: Hadron-Hadron Scattering
Depositing User: Symplectic Admin
Date Deposited: 10 Oct 2022 09:46
Last Modified: 18 Mar 2024 04:01
DOI: 10.1007/JHEP08(2022)089
Open Access URL: https://link.springer.com/article/10.1007/JHEP08(2...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3165144