https://doi.org/10.1140/epjp/s13360-024-05930-5
Regular Article
Charged particle multiplicity fluctuation in 
collisions at RHIC and LHC energies using Angantyr model
1
Indian Institute of Science Education and Research Bhopal, Bhopal, India
2
Indian Institute of Technology Bombay, 400076, Mumbai, India
3
Wayne State University, Detroit, USA
Received:
18
May
2024
Accepted:
13
December
2024
Published online:
5
February
2025
Event-by-event fluctuations of the charged particle multiplicity are studied for a wide range of centralities for Au−Au collisions at 
, Pb−Pb collisions at 
and 5.02 TeV using the Pythia8 Angantyr model. The centrality dependence of 
observable, which quantifies the fluctuations in terms of scaled variance, is studied for different pseudo-rapidity ranges and has been compared with those obtained from a simple participant superposition model. The was found to be lower than the expectations from the participant model. The estimate would act like a baseline for current and future measurements of event-by-event fluctuations in the charged particle multiplicities in systems at LHC energies where no de-confined medium of quarks and gluons are formed.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
