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Higher-order symmetry plane correlations in Pb-Pb collisions at √sNN = 5.02 TeV

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The correlations between event-by-event fluctuations of symmetry planes are measured in Pb-Pb collisions at a center-of-mass energy per nucleon pair root sNN = 5.02 TeV recorded by the ALICE detector at the Large Hadron Collider. This analysis is conducted using the Gaussian estimator technique, whi...

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Main Authors: Acharya, Shreyasi (Author) , Angelov, Venelin (Author) , Berdnikova, Anastasia (Author) , Bergmann, Luisa (Author) , Bórquez Cárcamo, Andrés G. (Author) , Danisch, Meike (Author) , Feuillard, Victor (Author) , Fokin, Ilya D. (Author) , Glässel, Peter (Author) , Grünwald, Nadine (Author) , Menzel, Marius (Author) , Nath, Abhishek (Author) , Pachmayer, Yvonne C. (Author) , Reygers, Klaus (Author) , Schicker, Rainer (Author) , Schlepper, Felix (Author) , Seo, Jinjoo (Author) , Skorodumovs, Georgijs (Author) , Stachel, Johanna (Author) , Stiefelmaier, Stephan (Author) , Veen, Casper Arie van (Author) , Windelband, Bernd (Author) , Yüncü, Alperen (Author) , Zanone, Federica (Author) , Zhang, Biao (Author)
Corporate Author: ALICE (Author)
Format: Article (Journal)
Language:English
Published: 2025
In: Physical review
Year: 2025, Volume: 111, Issue: 6, Pages: 064913-1 - 064913-25
ISSN:2469-9993
DOI:10.1103/zx6t-29hf
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/zx6t-29hf
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Author Notes:S. Acharya et. al. (ALICE Collaboration)
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Summary:The correlations between event-by-event fluctuations of symmetry planes are measured in Pb-Pb collisions at a center-of-mass energy per nucleon pair root sNN = 5.02 TeV recorded by the ALICE detector at the Large Hadron Collider. This analysis is conducted using the Gaussian estimator technique, which is insensitive to biases from correlations between different flow amplitudes. The study presents, for the first time, the centrality dependence of correlations involving up to five different symmetry planes. The correlation strength varies depending on the harmonic order of the symmetry plane and the collision centrality. Comparisons with measurements from lower energies indicate no significant differences within uncertainties. Additionally, the results are compared with hydrodynamic model calculations. Although the model predictions provide a qualitative explanation of the experimental results, they overestimate the data for some observables. This is particularly true for correlators that are sensitive to the nonlinear response of the medium to initial-state anisotropies in the collision system. As these new correlators provide unique information-independent of flow amplitudes-their usage in future model developments can further constrain the properties of the strongly interacting matter created in ultrarelativistic heavy-ion collisions.
Item Description:ALICE Collaboration:
Online veröffentlicht: 30. Juni 2025
Im Titel steht sNN unter dem Wurzelzeichen
Gesehen am 11.03.2026
Physical Description:Online Resource
ISSN:2469-9993
DOI:10.1103/zx6t-29hf

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