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Correlated event-by-event fluctuations of flow harmonics in Pb-Pb collisions at √sNN=2.76 TeV (CROSBI ID 236213)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

(ALICE Collaboration) Adam, J. ; ... ; Antičić, Tome ; ... ; Gotovac, Sven ; ... ; Erhardt, Filip ; ... ; Mudnić, Eugen ; ... et al. Correlated event-by-event fluctuations of flow harmonics in Pb-Pb collisions at √sNN=2.76 TeV // Physical review letters, 117 (2016), 182301-1-182301-14. doi: 10.1103/PhysRevLett.117.182301

Podaci o odgovornosti

Adam, J. ; ... ; Antičić, Tome ; ... ; Gotovac, Sven ; ... ; Erhardt, Filip ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Simatović, Goran ; ... ; Utrobičić, Antonija ; ... ; Vicković, Linda ; ... ; Zyzak, M.

ALICE Collaboration

engleski

Correlated event-by-event fluctuations of flow harmonics in Pb-Pb collisions at √sNN=2.76 TeV

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.

flow harmonics ; fluctuations ; correlation

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Podaci o izdanju

117

2016.

182301-1-182301-14

objavljeno

0031-9007

1079-7114

10.1103/PhysRevLett.117.182301

Povezanost rada

Fizika

Poveznice
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