ATLAS Collaboration (Including: Becker, K., Facini, G., Harrison, P. F., Jones, E., Martin, T. A., Mitra, Subhobrata, Morgenstern, S., Murray, W. J., Pollard, C. S., Roberts, B. A., Spangenberg, Martin and Vladimirov, V. E.). (2022) Modelling and computational improvements to the simulation of single vector-boson plus jet processes for the ATLAS experiment. Journal of High Energy Physics, 8 . 89. doi:10.1007/jhep08(2022)089 ISSN 1029-8479.

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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.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Hadrons -- Scattering, Hadron interactions, Proton-proton interactions, Bosons
Journal or Publication Title:	Journal of High Energy Physics
Publisher:	Springer
ISSN:	1029-8479
Official Date:	5 August 2022
Dates:	Date Event 5 August 2022 Available 30 June 2022 Accepted
Volume:	8
Article Number:	89
DOI:	10.1007/jhep08(2022)089
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Open Access (Creative Commons)
Date of first compliant deposit:	5 September 2022
Date of first compliant Open Access:	5 September 2022
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Gosudarstvennyĭ komitet po nauke i tekhnologii︠a︡m http://viaf.org/viaf/154732294 UNSPECIFIED Conselho Nacional de Desenvolvimento Científico e Tecnológico http://dx.doi.org/10.13039/501100003593 UNSPECIFIED Fundação de Amparo à Pesquisa do Estado de São Paulo http://dx.doi.org/10.13039/501100001807 UNSPECIFIED [NSERC] Natural Sciences and Engineering Research Council of Canada http://dx.doi.org/10.13039/501100000038 UNSPECIFIED [NRC] National Research Council Canada http://dx.doi.org/10.13039/501100000046 UNSPECIFIED [CFI] Canada Foundation for Innovation http://dx.doi.org/10.13039/501100000196 UNSPECIFIED CERN http://dx.doi.org/10.13039/100012470 UNSPECIFIED Agencia Nacional de Investigación y Desarrollo https://www.anid.cl/ UNSPECIFIED Chinese Academy of Sciences https://www.cas.cn/ UNSPECIFIED Ministry of Science and Technology of the People's Republic of China http://dx.doi.org/10.13039/501100002855 UNSPECIFIED [NSFC] National Natural Science Foundation of China http://dx.doi.org/10.13039/501100001809 UNSPECIFIED Ministerio de Ciencia Tecnología e Innovación https://minciencias.gov.co/ UNSPECIFIED Ministerstvo Školství, Mládeže a Tělovýchovy http://dx.doi.org/10.13039/501100001823 UNSPECIFIED Ministerstvo Průmyslu a Obchodu http://dx.doi.org/10.13039/501100004578 UNSPECIFIED Danmarks Grundforskningsfond http://dx.doi.org/10.13039/501100001732 UNSPECIFIED Statens Naturvidenskabelige Forskningsrad http://dx.doi.org/10.13039/100008367 UNSPECIFIED Institut National de Physique Nucléaire et de Physique des Particules http://dx.doi.org/10.13039/501100012441 UNSPECIFIED [CEA] Commissariat à l'Énergie Atomique et aux Énergies Alternatives http://dx.doi.org/10.13039/501100006489 UNSPECIFIED Shota Rustaveli National Science Foundation http://dx.doi.org/10.13039/501100004801 UNSPECIFIED Bundesministerium für Bildung und Forschung http://dx.doi.org/10.13039/501100002347 UNSPECIFIED Helmholtz-Gemeinschaft http://dx.doi.org/10.13039/501100001656 UNSPECIFIED Max-Planck-Gesellschaft http://dx.doi.org/10.13039/501100004189 UNSPECIFIED General Secretariat for Research and Technology http://dx.doi.org/10.13039/501100003448 UNSPECIFIED Research Grants Council, University Grants Committee http://dx.doi.org/10.13039/501100002920 UNSPECIFIED Israel Science Foundation http://dx.doi.org/10.13039/501100003977 UNSPECIFIED Weizmann Institute of Science http://dx.doi.org/10.13039/501100001735 UNSPECIFIED Istituto Nazionale di Fisica Nucleare http://dx.doi.org/10.13039/501100013168 UNSPECIFIED [MEXT] Ministry of Education, Culture, Sports, Science and Technology http://dx.doi.org/10.13039/501100001700 UNSPECIFIED [JSPS] Japan Society for the Promotion of Science http://dx.doi.org/10.13039/501100001691 UNSPECIFIED Centre National pour la Recherche Scientifique et Technique http://dx.doi.org/10.13039/501100006319 UNSPECIFIED [NWO] Nederlandse Organisatie voor Wetenschappelijk Onderzoek http://dx.doi.org/10.13039/501100003246 UNSPECIFIED Norges Forskningsråd http://dx.doi.org/10.13039/501100005416 UNSPECIFIED Poland. 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