Anders, J. K.; Beck, H. P.; Chatterjee, M.; Ereditato, A.; Fehr, A.; Franconi, L.; Haug, S.; Lehmann, Niklaus; Miucci, A.; Weber, M. S.; Weston, T. D. (2022). Emulating the impact of additional proton–proton interactions in the ATLAS simulation by presampling sets of inelastic Monte Carlo events. Computing and software for big science, 6(1) Springer 10.1007/s41781-021-00062-2
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The accurate simulation of additional interactions at the ATLAS experiment for the analysis of proton–proton collisions delivered by the Large Hadron Collider presents a significant challenge to the computing resources. During the LHC Run 2 (2015–2018), there were up to 70 inelastic interactions per bunch crossing, which need to be accounted for in Monte Carlo (MC) production. In this document, a new method to account for these additional interactions in the simulation chain is described. Instead of sampling the inelastic interactions and adding their energy deposits to a hard-scatter interaction one-by-one, the inelastic interactions are presampled, independent of the hard scatter, and stored as combined events. Consequently, for each hard-scatter interaction, only one such presampled event needs to be added as part of the simulation chain. For the Run 2 simulation chain, with an average of 35 interactions per bunch crossing, this new method provides a substantial reduction in MC production CPU needs of around 20%, while reproducing the properties of the reconstructed quantities relevant for physics analyses with good accuracy.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) 10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) |
UniBE Contributor: |
Anders, John Kenneth, Beck, Hans Peter, Chatterjee, Meghranjana, Ereditato, Antonio, Franconi, Laura, Haug, Sigve, Lehmann, Niklaus, Miucci, Antonio, Weber, Michele, Weston, Thomas Daniel |
Subjects: |
500 Science > 530 Physics |
ISSN: |
2510-2044 |
Publisher: |
Springer |
Language: |
English |
Submitter: |
BORIS Import LHEP |
Date Deposited: |
04 Apr 2023 15:16 |
Last Modified: |
13 Apr 2023 14:54 |
Publisher DOI: |
10.1007/s41781-021-00062-2 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autor*innen namentlich erwaehnt; ATLAS collaboration |
BORIS DOI: |
10.48350/181465 |
URI: |
https://boris.unibe.ch/id/eprint/181465 |
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