Correlated event-by-event fluctuations of flow harmonics in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76 $ TeV

J Adam , Łukasz Graczykowski , Monika Jakubowska , Małgorzata Janik , Adam Kisiel , Jeremi Niedziela , Janusz Oleniacz , Jan Pluta , Krzysztof Sielewicz , Adam Szczepankiewicz , Maciej Szymański , Anna Zaborowska , Hanna Zbroszczyk

Abstract

We report the measurements of correlations between event-by-event fluctuations of amplitudes of anisotropic flow harmonics in nucleus-nucleus collisions, obtained for the first time using a new analysis method based on multiparticle cumulants in mixed harmonics. This novel method is robust against systematic biases originating from nonflow effects and by construction any dependence on symmetry planes is eliminated. We demonstrate that correlations of flow harmonics exhibit a better sensitivity to medium properties than the individual flow harmonics. The new measurements are performed in Pb-Pb collisions at the center-of-mass energy per nucleon pair of √sNN=2.76  TeV by the ALICE experiment at the Large Hadron Collider. The centrality dependence of correlation between event-by-event fluctuations of the elliptic v2 and quadrangular v4 flow harmonics, as well as of anticorrelation between v2 and triangular v3 flow harmonics are presented. The results cover two different regimes of the initial state configurations: geometry dominated (in midcentral collisions) and fluctuation dominated (in the most central collisions). Comparisons are made to predictions from Monte Carlo Glauber, viscous hydrodynamics, ampt, and hijing models. Together with the existing measurements of the individual flow harmonics the presented results provide further constraints on the initial conditions and the transport properties of the system produced in heavy-ion collisions.
Collective authorALICE Collaboration
Author J Adam
J Adam,,
-
, Łukasz Graczykowski ZFJ
Łukasz Graczykowski,,
- Nuclear Physics Division
, Monika Jakubowska ISEP
Monika Jakubowska,,
- The Institute of Control and Industrial Electronics
, Małgorzata Janik ZFJ
Małgorzata Janik,,
- Nuclear Physics Division
, Adam Kisiel ZFJ
Adam Kisiel,,
- Nuclear Physics Division
, Jeremi Niedziela - [European Organization for Nuclear Research (CERN), Geneva, Switzerland]
Jeremi Niedziela,,
-
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
, Janusz Oleniacz ZFJ
Janusz Oleniacz,,
- Nuclear Physics Division
, Jan Pluta ZFJ
Jan Pluta,,
- Nuclear Physics Division
, Krzysztof Sielewicz - [European Organization for Nuclear Research (CERN), Geneva, Switzerland]
Krzysztof Sielewicz,,
-
- European Organization for Nuclear Research (CERN), Geneva, Switzerland
, Adam Szczepankiewicz II - European Organization for Nuclear Research Geneva Switzerland (CERN )
Adam Szczepankiewicz,,
- The Institute of Computer Science
et al.`
Total number of authors1001
Journal seriesPhysical Review Letters, ISSN 0031-9007
Issue year2016
Vol117
Pages182301-1-182301-14
Publication size in sheets0.65
DOIDOI:10.1103/PhysRevLett.117.182301
URL https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.117.182301
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa (CC-BY); after publication
File
PhysRevLett.117.182301.pdf 356.98 KB
Score (nominal)45
ScoreMinisterial score = 45.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 45.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 8.462 (2) - 2016=7.805 (5)
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