Speaker
Description
The study of quarkonium production in proton-nucleus collisions is an important tool to investigate cold nuclear matter (CNM) effects. Mechanisms such as the modification of the parton distribution functions in nuclei, the presence of a color glass condensate or coherent energy loss of the $c\overline{c}$ pair in the medium have been employed to describe J/$\psi$ production in proton-nucleus collisions at LHC energies. In addition, final state mechanisms, possibly related to the presence of a dense medium, are required to explain the stronger suppression observed for the loosely bound $\psi$(2S) state.
ALICE has measured quarkonium production in p-Pb collisions at backward ($-$4.46 $<$ $y_{\rm cms}$ $<$ $-$2.96), mid ($-$1.37 $<$ $y_{\rm cms}$ $<$ 0.43) and forward (2.03 $<$ $y_{\rm cms}$ $<$ 3.53) rapidity down to zero transverse momentum ($p_{\rm T}$). Results on J/$\psi$ nuclear modification factor ($R_{\rm pPb}$) measured at mid-$y$ at $\sqrt{s_{\rm NN}}$ = 5.02 TeV and at forward and backward $y$ at $\sqrt{s_{\rm NN}}$ = 8.16 TeV will be presented. J/$\psi$ production as a function of multiplicity and results on the J/$\psi$ $v_{2}$, obtained using J/$\psi$-hadron correlations, will also be discussed. Finally, we will present the results on $\psi$(2S) and $\Upsilon$ $R_{\rm pPb}$ in p-Pb collisions at $\sqrt{s_{\rm NN}}$ = 8.16 TeV at forward and backward $y$. All the results will be compared to those obtained at lower energies and with available theoretical calculations.
| Content type | Experiment |
|---|---|
| Collaboration | ALICE |
| Centralised submission by Collaboration | Presenter name already specified |
