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Accelerating LHC event generation with simplified pilot runs and fast PDFs

Bothmann, Enrico; Buckley, Andy; Christidi, Ilektra A.; Gütschow, Christian; Höche, Stefan; Knobbe, Max; Martin, Tim; Schönherr, Marek

Accelerating LHC event generation with simplified pilot runs and fast PDFs Thumbnail


Authors

Enrico Bothmann

Andy Buckley

Ilektra A. Christidi

Christian Gütschow

Stefan Höche

Max Knobbe

Tim Martin



Abstract

Poor computing efficiency of precision event generators for LHC physics has become a bottleneck for Monte-Carlo event simulation campaigns. We provide solutions to this problem by focusing on two major components of general-purpose event generators: The PDF evaluator and the matrix-element generator. For a typical production setup in the ATLAS experiment, we show that the two can consume about 80% of the total runtime. Using NLO simulations of pp→ℓ+ℓ−+jets and pp→tt¯+jets as an example, we demonstrate that the computing footprint of LHAPDF and SHERPA can be reduced by factors of order 10, while maintaining the formal accuracy of the event sample. The improved codes are made publicly available.

Citation

Bothmann, E., Buckley, A., Christidi, I. A., Gütschow, C., Höche, S., Knobbe, M., …Schönherr, M. (2022). Accelerating LHC event generation with simplified pilot runs and fast PDFs. The European Physical Journal C, 82(12), Article 1128. https://doi.org/10.1140/epjc/s10052-022-11087-1

Journal Article Type Article
Acceptance Date Nov 29, 2022
Online Publication Date Dec 14, 2022
Publication Date Dec 14, 2022
Deposit Date Mar 29, 2023
Publicly Available Date May 31, 2023
Journal The European Physical Journal C
Print ISSN 1434-6044
Publisher SpringerOpen
Peer Reviewed Peer Reviewed
Volume 82
Issue 12
Article Number 1128
DOI https://doi.org/10.1140/epjc/s10052-022-11087-1

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Published Journal Article (1.9 Mb)
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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
Open Access. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.





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