ALICE luminosity determination for Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV

Abstract

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 $\sqrt{s_{\mathrm{NN}}}=5.02$ 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 $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV, obtained by efficiency correction of the V0-based visible cross section, was measured to be $7.67\pm 0.25$ b, in agreement with predictions using the Glauber model.

arXiv comment25 pages, 6 captioned figures, 1 table, authors from page 20, published version, figures at http://alice-publications.web.cern.ch/node/7841

References in corpus (22)

• Glauber Modeling in High Energy Nuclear Collisions
• Performance of the ALICE Experiment at the CERN LHC
• Improved luminosity determination in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector at the LHC
• Alternative ansatz to wounded nucleon and binary collision scaling in high-energy nuclear collisions
• Centrality determination of Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV with ALICE
• Luminosity determination in pp collisions at $\sqrt{s}$ = 8 TeV using the ATLAS detector at the LHC
• Performance of the ALICE VZERO system
• Alignment of the ALICE Inner Tracking System with cosmic-ray tracks
• Precision luminosity measurement in proton-proton collisions at $\sqrt{s}=$ 13 TeV in 2015 and 2016 at CMS
• Luminosity Determination in pp Collisions at sqrt(s)=7 TeV Using the ATLAS Detector at the LHC
• Centrality dependence of the charged-particle multiplicity density at mid-rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Measurement of inelastic, single- and double-diffraction cross sections in proton-proton collisions at the LHC with ALICE
• Precision luminosity measurements at LHCb
• Measurement of the cross section for electromagnetic dissociation with neutron emission in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• Mutual heavy ion dissociation in peripheral collisions at ultrarelativistic energies
• Progress in the Glauber model at collider energies
• Measurement of visible cross sections in proton-lead collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV in van der Meer scans with the ALICE detector
• Absolute luminosity measurements with the LHCb detector at the LHC
• A generator of forward neutrons for ultra-peripheral collisions: $\textbf{n$\mathbf{_O^O}$n}$
• The ATLAS beam pick-up based timing system
• Notes on van der Meer Scan for Absolute Luminosity Measurement
• Van der Meer Scan Luminosity Measurement and Beam-Beam Correction

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