Quarkonium production in PbPb collisions

This physics analysis summary describes the $\Jpsi \rightarrow \mumu$ and the $\Upsilon \rightarrow \mumu$ analyses performed on \PbPb collisions at $\sqrtsnn = 2.76\TeV$ data, recorded in 2010 with the CMS detector. The inclusive \Jpsi yield is measured, separated also in prompt and non-prompt contributions, and compared to \pp at 2.76\TeV, recorded in March 2011, scaled by the number of binary collisions. Prompt \Jpsi are suppressed in central collisions compared to peripheral collisions, and the most peripheral bin shows also suppression with respect to the \pp reference. Non-prompt \Jpsi are also suppressed but less than the prompt \Jpsi, and show no centrality dependence. The $\Upsilon$(1S) production is measured and observed also suppressed. Finally, the suppression of the $\Upsilon$(2S+3S)/$\Upsilon$(1S) ratio in \PbPb with respect to \pp is quantified.