Modelling and computational improvements to the simulation of single vector-boson plus jet processes for the ATLAS experiment Aad, G. Aguilar Saavedra, Juan Antonio Rodríguez Chala, Mikael Atlas Collaboration Hadron-Hadron scattering This paper presents updated Monte Carlo configurations used to model the production of single electroweak vector bosons (W, Z/gamma*) 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. 2022-09-22T11:47:23Z 2022-09-22T11:47:23Z 2022-08-05 info:eu-repo/semantics/article The ATLAS collaboration... [et al.]. Modelling and computational improvements to the simulation of single vector-boson plus jet processes for the ATLAS experiment. J. High Energ. Phys. 2022, 89 (2022). [https://doi.org/10.1007/JHEP08(2022)089] https://hdl.handle.net/10481/76869 10.1007/JHEP08(2022)089 eng http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Atribución 4.0 Internacional Springer