LHC EFT WG note: SMEFT predictions, event reweighting, and simulation
This note provides a comprehensive overview of tools for predicting observables in the Standard Model effective field theory (SMEFT) at both tree level and one loop using event generators. We evaluate three primary methodologies–event reweighting, separate simulation of squared matrix elements, and full SMEFT process simulation–focusing on their statistical performance, computational efficiency, and potential biases. Each approach is assessed in terms of its accuracy, highlighting trade-offs between precision and resource demands. Practical insights into their applicability for high-energy physics analyses are offered, with particular attention to processes where SMEFT effects are significant. Additionally, we discuss the role of helicity in reweighting strategies and its impact on the quality of predictions. By comparing the methods across various LHC processes, this note provides guidance for selecting the most effective strategy for various SMEFT studies, ensuring robust predictions while optimizing computational resources.
Authors
- M. Presilla (ORCID: https://orcid.org/0000-0003-2808-7315)
- S. Sánchez Cruz (ORCID: https://orcid.org/0000-0002-9991-195X)
- A. Grohsjean (ORCID: https://orcid.org/0000-0003-0748-8494)
- Jennet Elizabeth Dickinson (ORCID: https://orcid.org/0000-0001-5450-5328)
- G. Boldrini (ORCID: https://orcid.org/0000-0001-5490-605X)
- S. H. Robertson (ORCID: https://orcid.org/0000-0002-2332-8784)
- R. Goldouzian (ORCID: https://orcid.org/0000-0002-0295-249X)
- L. Jeppe (ORCID: https://orcid.org/0000-0002-1029-0318)
- Charlotte Knight
- Nick L. Smith (ORCID: https://orcid.org/0000-0003-4478-2772)
- V. Perovic (ORCID: https://orcid.org/0009-0002-8559-0531)
- H. Nelson (ORCID: https://orcid.org/0000-0001-5592-0785)
- S. Bhattacharya (ORCID: https://orcid.org/0000-0002-0526-6161)
- Kelci Mohrman (ORCID: https://orcid.org/0009-0007-2940-0496)
- Alberto Belvedere (ORCID: https://orcid.org/0000-0002-2802-8203)
- A. Calandri (ORCID: https://orcid.org/0000-0001-7774-0099)
- Olivier Mattelaer
- Franz Glessgen (ORCID: https://orcid.org/0009-0001-0865-0476)
- S. Chatterjee (ORCID: https://orcid.org/0000-0003-2660-0349)
Institutions
- Karlsruhe Institute of Technology (DE)
- University of Notre Dame (US)
- Northwestern University (US)
- Fermi National Accelerator Laboratory (US)
- Austrian Academy of Sciences (AT)
- École Polytechnique (FR)
- Wayne State University (US)
- Deutsches Elektronen-Synchrotron DESY (DE)
- University of Florida (US)
- ETH Zurich (CH)
- Laboratoire Leprince-Ringuet (FR)
- Imperial College London (GB)
- École Polytechnique Fédérale de Lausanne (CH)
- European Organization for Nuclear Research (CH)
- UCLouvain (BE)
Publication Details
- Journal
- SciPost Physics Community Reports
- Published
- 2024-11-29
- DOI
- https://doi.org/10.21468/scipostphyscommrep.4
- Citations
- 3
- Primary Topic
- Particle physics theoretical and experimental studies
- Type
- article
- Field-Weighted Citation Impact
- 1.98
Funders
- U.S. Department of Energy
- Alexander von Humboldt-Stiftung
- Office of Science
- High Energy Physics