The CMS collaboration2024-08-092024-08-092024The CMS collaboration. (2024). Higher-order moments of the elliptic flow distribution in PbPb collisions at $$ \sqrt{s_{\textrm{NN}}} $$= 5.02 TeV. Journal of High Energy Physics, 2024(2), 106. https://doi.org/10.1007/JHEP02(2024)106https://hdl.handle.net/1911/117626The hydrodynamic flow-like behavior of charged hadrons in high-energy lead-lead collisions is studied through multiparticle correlations. The elliptic anisotropy values based on different orders of multiparticle cumulants, v2{2k}, are measured up to the tenth order (k = 5) as functions of the collision centrality at a nucleon-nucleon center-of-mass energy of $$ \sqrt{s_{\textrm{NN}}} $$= 5.02 TeV. The data were recorded by the CMS experiment at the LHC and correspond to an integrated luminosity of 0.607 nb−1. A hierarchy is observed between the coefficients, with v2{2} > v2{4} ≳ v2{6} ≳ v2{8} ≳ v2{10}. Based on these results, centrality-dependent moments for the fluctuation-driven event-by-event v2 distribution are determined, including the skewness, kurtosis and, for the first time, superskewness. Assuming a hydrodynamic expansion of the produced medium, these moments directly probe the initial-state geometry in high-energy nucleus-nucleus collisions.engExcept where otherwise noted, this work is licensed under a Creative Commons Attribution (CC BY) license.  Permission to reuse, publish, or reproduce the work beyond the terms of the license or beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.Journal articleJHEP02-2024-106https://doi.org/10.1007/JHEP02(2024)106