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Higher-order symmetry plane correlations in Pb-Pb collisions at

Publication ,  Journal Article
Acharya, S; Agarwal, A; Aglieri Rinella, G; Aglietta, L; Agnello, M; Agrawal, N; Ahammed, Z; Ahmad, S; Ahn, SU; Ahuja, I; Akindinov, A; Ali, B ...
Published in: Physical Review C
June 30, 2025

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 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.

Duke Scholars

Published In

Physical Review C

DOI

EISSN

2469-9993

ISSN

2469-9985

Publication Date

June 30, 2025

Volume

111

Issue

6

Publisher

American Physical Society (APS)

Related Subject Headings

  • 5106 Nuclear and plasma physics
 

Citation

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Acharya, S., Agarwal, A., Aglieri Rinella, G., Aglietta, L., Agnello, M., Agrawal, N., … Kučera, V. (2025). Higher-order symmetry plane correlations in Pb-Pb collisions at sNN=5.02TeV. Physical Review C, 111(6). https://doi.org/10.1103/zx6t-29hf
Acharya, S., A. Agarwal, G. Aglieri Rinella, L. Aglietta, M. Agnello, N. Agrawal, Z. Ahammed, et al. “Higher-order symmetry plane correlations in Pb-Pb collisions at sNN=5.02TeV.” Physical Review C 111, no. 6 (June 30, 2025). https://doi.org/10.1103/zx6t-29hf.
Acharya S, Agarwal A, Aglieri Rinella G, Aglietta L, Agnello M, Agrawal N, et al. Higher-order symmetry plane correlations in Pb-Pb collisions at sNN=5.02TeV. Physical Review C. 2025 Jun 30;111(6).
Acharya, S., et al. “Higher-order symmetry plane correlations in Pb-Pb collisions at sNN=5.02TeV.” Physical Review C, vol. 111, no. 6, American Physical Society (APS), June 2025. Crossref, doi:10.1103/zx6t-29hf.
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Higher-order symmetry plane correlations in Pb-Pb collisions at sNN=5.02TeV. Physical Review C. American Physical Society (APS); 2025 Jun 30;111(6).

Published In

Physical Review C

DOI

EISSN

2469-9993

ISSN

2469-9985

Publication Date

June 30, 2025

Volume

111

Issue

6

Publisher

American Physical Society (APS)

Related Subject Headings

  • 5106 Nuclear and plasma physics