TY  - SER
AU  - Aad,G.
AU  - Abbott,B.
AU  - Abbott,D.C.
AU  - Aliev,M.
AU  - Kostyukhin,Vadim V.
AU  - Kuchinskaya,Olesya I.
AU  - Penzin,Maxim S.
TI  - Modelling and computational improvements to the simulation of single vector-boson plus jet processes for the ATLAS experiment
KW  - ATLAS, детектор
KW  - Большой адронный коллайдер
KW  - столкновение частиц
KW  - протон-протонные столкновения
KW  - векторные бозоны
KW  - статьи в журналах
N1  - Библиогр.: 79 назв
N2  - 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
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000306
ER  -