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Sumit Basu (Lund University)

Sumit Basu

Postdoctoral Researcher

Sumit Basu (Lund University)

ALICE luminosity determination for Pb-Pb collisions at √ s NN= 5.02 TeV

Author

  • S. Acharya
  • S. Basu
  • P. Christiansen
  • O. Matonoha
  • A.F. Nassirpour
  • A. Ohlson
  • A. Oskarsson
  • T. Richert
  • D. Silvermyr
  • J. Staa
  • O. Vazquez Rueda
  • N. Zurlo
Show all

Summary, in English

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 √s 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 √s NN= 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. © 2024 Institute of Physics. All rights reserved.

Department/s

  • Particle and nuclear physics

Publishing year

2024

Language

English

Publication/Series

Journal of Instrumentation

Volume

19

Issue

2

Document type

Journal article

Publisher

IOP Publishing

Topic

  • Subatomic Physics

Keywords

  • Analysis and statistical methods
  • Data processing methods
  • Binary alloys
  • Data handling
  • High energy physics
  • Lead alloys
  • Uncertainty analysis
  • A-center
  • Analyse and statistical method
  • Center-of-mass energies
  • Centre-of-mass energies
  • Large Hadron Collider
  • Large-hadron colliders
  • Particles detection
  • Pb-Pb collisions
  • Zero-degree calorimeters
  • Luminance

Status

Published

ISBN/ISSN/Other

  • ISSN: 1748-0221