Speaker
Description
Results on quarkonium production in p-Pb collisions from LHC run-1 and run-2 have now reached a considerable accuracy and represent, together with RHIC findings, an important tool for the study of cold nuclear matter effects. While for strongly bound states those effects are probably dominated by nuclear shadowing, excited quarkonium states have been shown to be affected by additional mechanisms, likely related to final state dissociation. As the size of these effects is not negligible, their contribution can be significant and in principle affect our interpretation of A-A results.
It remains to be seen if the information gained via the study of p-A collisions can be effectively used to extract information on the contribution of non-QGP effects to quarkonium production in A-A interactions.
In this contribution, the main results obtained at the LHC from the study of p-Pb collisions will be critically reviewed and possible extrapolations of the presently available data to the conditions of nucleus-nucleus collisions will be discussed. In this way, it could be possible to provide clues to some of the present issues in the field, as the evidence for direct suppression of the bottomonium 1$^{--}$ ground state ($\Upsilon(1S)$) in A-A collisions, as well as more precise insights on the size of the recombination mechanisms for J/$\psi$ production at low $p_{\rm T}$.