ALICE results on quarkonia

TL;DR

This paper presents ALICE experiment measurements of quarkonia production in proton-proton and lead-lead collisions at the LHC, focusing on their yields, nuclear modification factors, and flow to understand the quark-gluon plasma properties.

Contribution

It provides detailed differential measurements of quarkonia yields and their dependence on collision centrality, transverse momentum, and rapidity, offering new insights into medium effects in heavy-ion collisions.

Findings

Centrality dependence of J/psi nuclear modification factors

Transverse momentum and rapidity dependence of yields

Preliminary results on J/psi elliptic flow and psi(2S) production

Abstract

The ALICE experiment has measured quarkonia production in pp and Pb-Pb collisions at the CERN LHC, in the rapidity ranges |y|<0.9 and 2.5<y<4. Quarkonia are considered to be a sensitive probe of deconfinement, and a detailed differential study of their yields can give important information on the properties of the medium created in heavy-ion collisions. In this paper, we will mainly discuss the centrality dependence of the J/psi nuclear modification factors, as well as their p_T and y dependence in bins of centrality, which will be then compared to theoretical models. Preliminary results on the J/psi elliptic flow and on psi(2S) production will also be shown.