The simplified likelihood framework

Andy Buckley (School of Physics & Astronomy, University of Glasgow, Glasgow, Scotland, U.K.) ; Matthew Citron (University of California, Santa Barbara, California, U.S.A.) ; Sylvain Fichet (Walter Burke Institute for Theoretical Physics, California Institute of Technology, Pasadena, CA, 91125, U.S.A.; ICTP-SAIFR & IFT-UNESP, R. Dr. Bento Teobaldo Ferraz 271, São Paulo, Brazil) ; Sabine Kraml (Laboratoire de Physique Subatomique et de Cosmologie, Université Grenoble-Alpes, CNRS/IN2P3, 53 Avenue des Martyrs, Grenoble, F-38026, France) ; Wolfgang Waltenberger (Institut für Hochenergiephysik, Österreichische Akademie der Wissenschaften, Nikolsdorfer Gasse 18, Wien, 1050, Austria; Faculty of Physics, University of Vienna, Boltzmanngasse 5, Wien, 1090, Austria) ; et al. - Show all 6 authors

We discuss the simplified likelihood framework as a systematic approximation scheme for experimental likelihoods such as those originating from LHC experiments. We develop the simplified likelihood from the Central Limit Theorem keeping the next-to-leading term in the large N expansion to correctly account for asymmetries. Moreover, we present an efficient method to compute the parameters of the simplified likelihood from Monte Carlo simulations. The approach is validated using a realistic LHC-like analysis, and the limits of the approximation are explored. Finally, we discuss how the simplified likelihood data can be conveniently released in the HepData error source format and automatically built from it, making this framework a convenient tool to transmit realistic experimental likelihoods to the community.

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Published on:
08 April 2019
Publisher:
Springer
Published in:
Journal of High Energy Physics , Volume 2019 (2019)
Issue 4
Pages 1-27
DOI:
https://doi.org/10.1007/JHEP04(2019)064
arXiv:
1809.05548
Copyrights:
The Author(s)
Licence:
CC-BY-3.0

Fulltext files: