Speaker
Description
J/$\psi$ production provides a particular sensitivity to the medium which can be produced in heavy-ion collisions at ultrarelativistic energies as delivered by the LHC. The vacuum production is modelled by a reference measured in proton-proton collisions and potential initial-state effects can be constrained using p--Pb collisions in the same collision-energy regime.
In this contribution J/$\psi$ production measured at mid-rapidity ($|y|<0.9$) with the ALICE detector down to zero transverse momentum is presented. Final results of the proton-proton collisions at $\sqrt{s} = 5.02$ TeV collected in 2017 are presented which serve also as a high-precision reference for the nuclear modification factors in p--Pb and Pb--Pb collisions at the corresponding centre-of-mass collision energy. The status of the analysis of the nuclear modification factor and the separation of the prompt and non-prompt components of J/$\psi$ production in p--Pb collisions at $\sqrt{s_{\mathrm{NN}}} = 8.16$ TeV is shown. The status of the $p_{\rm T}$-differential J/$\psi$ cross section measurement in pp at $\sqrt{s} = 13$ TeV is also discussed. Available models are confronted with the data.
