ALICE luminosity determination for Pb–Pb collisions at √sNN = 5.02 TeV
ALICE Collaboration. (2024). ALICE luminosity determination for Pb–Pb collisions at √sNN = 5.02 TeV. Journal of Instrumentation, 19(2), Article P02039. https://doi.org/10.1088/1748-0221/19/02/P02039
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2024Copyright
© 2024 CERN for the benefit of the ALICE collaboration. Published by
IOP Publishing Ltd on behalf of Sissa Medialab.
Luminosity determination within the ALICE experiment is based on the measurement, in van der Meer scans, of the cross sections for visible processes involving one or more detectors (visible cross sections). In 2015 and 2018, the Large Hadron Collider provided Pb−Pb collisions at a centre-of-mass energy per nucleon pair of √sNN=5.02 TeV. Two visible cross sections, associated with particle detection in the Zero Degree Calorimeter (ZDC) and in the V0 detector, were measured in a van der Meer scan. This article describes the experimental set-up and the analysis procedure, and presents the measurement results. The analysis involves a comprehensive study of beam-related effects and an improved fitting procedure, compared to previous ALICE studies, for the extraction of the visible cross section. The resulting uncertainty of both the ZDC-based and the V0-based luminosity measurement for the full sample is 2.5%. The inelastic cross section for hadronic interactions in Pb−Pb collisions at √sNN=5.02 TeV, obtained by efficiency correction of the V0-based visible cross section, was measured to be 7.67±0.25 b, in agreement with predictions using the Glauber model.
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https://converis.jyu.fi/converis/portal/detail/Publication/213417883
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European Commission; Research Council of FinlandFunding program(s)
RIA Research and Innovation Action, H2020; Centre of Excellence, AoF
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about funding
In addition, individual groups or membershave received support from: Marie Skłodowska Curie, Strong 2020 — Horizon 2020, EuropeanResearch Council (grant nos. 824093, 896850, 950692), European Union; Academy of Finland(Center of Excellence in Quark Matter) (grant nos. 346327, 346328), Finland; Programa de Apoyospara la Superación del Personal Académico, UNAM, Mexico.License
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