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This is a Experimental Study study (also classified as: Quantitative Study).

October 12, 2025Open Access

Quarkonia collectivity in large collision systems with ALICE

Key Points

Elliptic flow measurements of quarkonia in Pb-Pb collisions indicate the thermalization of heavy quarks in the quark-gluon plasma, supporting their collective behavior.
New results on inclusive J/ψ elliptic flow using multiple methods demonstrate significant flow fluctuations, captured effectively through cumulant analysis.
The ALICE collaboration’s findings from Run 3 present a comparison of Υ(1S) flow measurements, further elucidating quarkonium behaviors in a strongly interacting medium.
Significant insights into the collective dynamics of heavy-flavor particles emerged from measurements taken at forward rapidity during ALICE's latest experimental run.

Abstract

Quarkonium production is one of the golden probes to study the quark--gluon plasma (QGP). Among many observables, the measurement of azimuthal anisotropies in quarkonium production sheds light on the collective behavior of heavy-flavor particles in a strongly interacting medium. In particular, the measurements of the elliptic flow (v₂) of quarkonia in Pb--Pb collisions at the LHC provide us direct evidence of heavy quark thermalization in the QGP. In these proceedings, new results of inclusive J/ψ elliptic flow measurement in Pb--Pb collisions carried out by the ALICE collaboration in Run 3 using three methods including event-plane, scalar-product and multi-particle correlation (cumulant) will be presented. The method of cumulant will give access to the J/ψ flow fluctuations at forward rapidity. Alongside the new flow measurements of J/ψ, new results of Υ (1S) flow measurement at forward rapidity in ALICE Run 3 will be presented as well with comparison to model calculations.

Quarkonia collectivity in large collision systems with ALICE

Key Points

Abstract

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