# Centrality determination in heavy-ion collisions with the LHCb detector

Aaij, R, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Aidala, CA, Aiola, S, Ajaltouni, Z, Akar, S, Albrecht, J
et al (show 933 more authors) (2022) Centrality determination in heavy-ion collisions with the LHCb detector. JOURNAL OF INSTRUMENTATION, 17 (5). P05009-P05009.

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## Abstract

<jats:title>Abstract</jats:title> <jats:p>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 √<jats:italic>s</jats:italic> <jats:sub>NN</jats:sub> = 5 TeV and lead-neon fixed-target collisions at √<jats:italic>s</jats:italic> <jats:sub>NN</jats:sub> = 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.</jats:p>

Item Type: Article calibration and fitting methods, cluster finding, Pattern recognition, Performance of High Energy Physics Detectors, Simulation methods and programs Faculty of Science and Engineering > School of Physical Sciences Symplectic Admin 31 Aug 2022 10:16 18 Jan 2023 20:46 10.1088/1748-0221/17/05/P05009 https://iopscience.iop.org/article/10.1088/1748-02... https://livrepository.liverpool.ac.uk/id/eprint/3162854