Charged particle multiplicity fluctuation in A-A collisions at RHIC and LHC energies using Angantyr model

2024/03/04 by Pritindra Bhowmick, Bhowmick, Pritindra, Sadhana Dash +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2403.01833

openalex publication_date 2024/03/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Event-by-event fluctuations of the charged particle multiplicity are studied for a wide range of centralities for Au-Au collisions at √s_NN = 200 GeV, Pb-Pb collisions at √s_NN = 2.76 TeV and 5.02 TeV using the Pythia 8 Angantyr model. The centrality dependence of ω_ch observable, which quantifies the fluctuations in terms of scaled variance is studied for different pseudorapidity ranges and has been compared with those obtained from a simple participant superposition model. The ω_ch 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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