Speaker
Description
Quarkonia are key probes of the quark-gluon plasma (QGP). Their azimuthal anisotropies, quantified by flow coefficients, provide insight into the collective behavior and degree of thermalization of heavy quarks in the medium. In particular, the elliptic flow $v_2$ of the J/$\psi$ meson in Pb-Pb collisions at the LHC has revealed significant collectivity, supporting scenarios of charm-quark thermalization and (re)generation at low transverse momentum. Complementary measurements of the Υ(1S) elliptic flow provide information on the response of beauty quarks, which are expected to couple less strongly with the medium than charm quarks, due to their larger mass. In addition, the observation of collective-like effects in high-multiplicity pp and p-Pb collisions raises questions about the origin of collectivity and the minimal conditions needed for QGP formation.
In this contribution, measurements of quarkonium elliptic flow from small (pp) to large (Pb-Pb) collision systems carried out by ALICE using Run 3 data will be presented. Elliptic flow of J/$\psi$ in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.36 TeV using the event-plane, scalar product, and multi-particle cumulants will be discussed, as well as the $v_2$ of Y(1S). These results will be compared with theoretical models. Finally, new results on J/$\psi$ flow in pp collisions at $\sqrt{s}$ = 13.6 TeV at midrapidity will be presented, further investigating the emergence of collective behavior in high-energy collisions.
