https://doi.org/10.1051/epjconf/202531607006
Probing Hydrodynamics in PbPb Collisions at 5.02 TeV with Higher-order Cumulants
Indian Institute of Technology Madras, Chennai, India
Published online: 27 January 2025
The elliptic flow of charged hadrons is studied through multiparticle correlations in PbPb collisions at √sNN = 5.02 TeV, corresponding to an integrated luminosity of 0.607 nb−1. v2 {2k} are measured up to the tenth order (k = 5) as functions of the collision centrality. They are shown to follow the ordering : v2{2} > v2{4} ≳ v2{6} ≳ v2{8} ≳ v2{10}. The centrality-dependent moments - skewness, kurtosis and, for the first time, superskewness, are measured for the fluctuation-driven event-by-event v2 distribution. These moments can be good probes of the initial-state geometry in high-energy nucleus-nucleus collisions, assuming a hydrodynamic expansion.
© The Authors, published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
