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  4. Higher-order moments of the elliptic flow distribution in PbPb collisions at √sNN=5.02 TeV
 
research article

Higher-order moments of the elliptic flow distribution in PbPb collisions at √sNN=5.02 TeV

Tumasyan, A.
•
Adam, W.
•
Andrejkovic, J. W.
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February 15, 2024
Journal of High Energy Physics

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, v(2){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 root s(NN) = 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 v(2){2} > v(2){4} greater than or similar to v(2){6} greater than or similar to v(2){8} greater than or similar to v(2){10}. Based on these results, centrality-dependent moments for the fluctuation-driven event-by-event v(2) 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.

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Type
research article
DOI
10.1007/JHEP02(2024)106
Web of Science ID

WOS:001185394700001

Author(s)
Tumasyan, A.
Adam, W.
Andrejkovic, J. W.
Bergauer, T.
Chatterjee, S.
Damanakis, K.
Dragicevic, M.
Del Valle, A. Escalante
Hussain, P. S.
Jeitler, M.
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Corporate authors
CMS Collaboration
Date Issued

2024-02-15

Publisher

Springer Nature

Published in
Journal of High Energy Physics
Issue

2

Start page

106

Subjects

Physical Sciences

•

Event-By-Event Fluctuation

•

Harmonic Flow

•

Heavy Ion Experiments

•

Relativistic Heavy Ion Physics

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPHE  
FunderGrant Number

SC (Armenia)

FWF (Austria)

FNRS (Belgium)

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Available on Infoscience
July 3, 2024
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/208966
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