Accelerating $\mathrm{LHC}$ event generation with simplified pilot runs and fast $\mathrm{PDF}$s
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...
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| Veröffentlicht in: | The European physical journal. C, Particles and fields Particles and fields, 2022-12, Vol.82 (12) |
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| container_title | The European physical journal. C, Particles and fields |
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| creator | Bothmann, Enrico Buckley, Andy Christidi, Ilektra A. Gütschow, Christian Höche, Stefan Knobbe, Max Martin, Tim Schönherr, Marek |
| description | 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→$t\bar{t}$+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. |
| format | Article |
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| language | eng |
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| source | DOAJ Directory of Open Access Journals; SpringerLink Journals; Springer Nature OA Free Journals; EZB-FREE-00999 freely available EZB journals |
| subjects | PHYSICS OF ELEMENTARY PARTICLES AND FIELDS |
| title | Accelerating $\mathrm{LHC}$ event generation with simplified pilot runs and fast $\mathrm{PDF}$s |
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