A standard convention for particle-level Monte Carlo event-variation weights

Bothmann, E. et al. (2023) A standard convention for particle-level Monte Carlo event-variation weights. SciPost Physics Core, 6(1), 007. (doi: 10.21468/scipostphyscore.6.1.007)

Abstract

Streams of event weights in particle-level Monte Carlo event generators are a convenient and immensely CPU-efficient approach to express systematic uncertainties in phenomenology calculations, providing systematic variations on the nominal prediction within a single event sample. But the lack of a common standard for labelling these variation streams across different tools has proven to be a major limitation for event-processing tools and analysers alike. Here we propose a well-defined, extensible community standard for the naming, ordering, and interpretation of weight streams that will serve as the basis for semantically correct parsing and combination of such variations in both theoretical and experimental studies.

• Item Type: Articles
• Additional Information: This work was supported in part by the European Union as part of the Marie Sklodowska-Curie Innovative Training Network MCnetITN3 (grant agreement no. 722104). Of the editors, AB thanks the Royal Society for University Research Fellowship grant UF160548; AB and CG thank STFC for funding through the UK experimental particle physics consolidated grants programme; CG also thanks STFC for supporting the SWIFT-HEP project (grant ST/V002627/1); SP would like to acknowledge funding from the Swedish Research Council (Vetenskapsrådet), contract numbers 2016-05996 and 2020-04303; MS is funded by the Royal Society through a University Research Fellowship (URF\R1\180549) and an Enhancement Award (RGF\EA\181033 and CEC19\100349), and supported by the STFC under grant agreement ST/P001246/1.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Buckley, Professor Andy
• Authors: Bothmann, E., Buckley, A., Gütschow, C., Prestel, S., Schönherr, M., Skands, P., Andersen, J. R., Bhattacharya, S., Butterworth, J., Singh Chahal, G., Corpe, L., Gellersen, L., Gignac, M., Höche, S., Kar, D., Krauss, F., Kretzschmar, J., Lönnblad, L., McFayden, J., Papaefstathiou, A., Plätzer, S., Schumann, S., Seymour, M. H., Siegert, F., and Siódmok, A.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: SciPost Physics Core
• Publisher: SciPost
• ISSN: 2666-9366
• ISSN (Online): 2666-9366
• Copyright Holders: Copyright © 2023 The Authors
• First Published: First published in SciPost Physics Core 6(1):007
• Publisher Policy: Reproduced under a Creative Commons License

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
300260		New physics studies with heavy flavour at the LHC	Andrew Buckley	The Royal Society (ROYSOC)	UF160548	P&S - Physics & Astronomy