Centrality determination in heavy-ion collisions with the LHCb detector

Journal article

Abstract The centrality of heavy-ion collisions is directly related to the created medium in these interactions. A procedure to determine the centrality of collisions with the LHCb detector is implemented for lead-lead collisions at √ s NN = 5 TeV and lead-neon fixed-target collisions at √ s NN = 69 GeV. The energy deposits in the electromagnetic calorimeter are used to determine and define the centrality classes. The correspondence between the number of participants and the centrality for the lead-lead collisions is in good agreement with the correspondence found in other experiments, and the centrality measurements for the lead-neon collisions presented here are performed for the first time in fixed-target collisions at the LHC.

Authors: Aaij, R; Beteta, CA; Ackernley, T; Adeva, B; Adinolfi, M

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: IOP Publishing
• Journal: Journal of Instrumentation
• Volume: 17
• Issue: 05
• Pages: P05009-P05009
• Publication date: 2022-05-05
• DOI: 10.1088/1748-0221/17/05/p05009
• EISSN: 1748-0221
• ISSN: 1748-0221
• Language: English
• Keywords: Statistics; Centrality; Physics; Mathematics; Optics; Detector; Particle physics; Heavy ion; Ion; Nuclear physics