Speaker
Xiaozhi Bai
(University of Science and Technology of China)
Description
Quarkonium production is a direct probe of deconfinement in heavy-ion collisions. For J/$\psi$, a bound state of ${c}\bar{c}$ quarks, the (re-)generation is found to be the dominant production mechanism at low transverse momentum ($p_{\rm T}$) and in central collisions at the LHC energies.
In addition, the non-prompt component of J/$\psi$ production from b-hadron decays allows one to access the interaction of b-hadrons with the QGP down to low transverse momentum.
In this talk, the measurements of the J/$\psi$ nuclear modification factor $R_{\rm AA}$, as a function of centrality and $p_{\rm T}$ in Pb--Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV will be shown. Prompt and non-prompt J/$\psi$ production measurements at midrapidity($|y| < 0.9$), will be presented exploiting the whole data sample collected from Run 2. The prompt/non-prompt separation extends down to very low $p_{\rm T}$ and its precision is improved significantly compared to the previous publications. All the results will be compared with model calculations.
Primary authors
Pengzhong Lu
(University of Science and Technology of China)
Xiaozhi Bai
(University of Science and Technology of China)
