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Higher-order moments of the elliptic flow distribution in PbPb collisions at sqrt(s_NN) = 5.02 TeV

BELFORTE, S.
•
CANDELISE, V.
•
CASARSA, M.
altro
VAZZOLER, F
2024
  • journal article

Periodico
JOURNAL OF HIGH ENERGY PHYSICS
Abstract
Abstract: The 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 √sNN = 5.02TeV. 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.
DOI
10.1007/JHEP02(2024)106
WOS
WOS:001185394700001
Archivio
https://hdl.handle.net/11368/3069299
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85194377842
https://link.springer.com/article/10.1007/JHEP02(2024)106
Diritti
open access
license:creative commons
license uri:http://creativecommons.org/licenses/by/4.0/
Soggetti
  • PARTICLE PHYSICS

  • LARGE HADRON COLLIDER...

  • CMS

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