Heavy flavor and Quarkonia in heavy-ion collisions with the CMS

Quarkonia are important probes for diagnosing and characterizing the quark-gluon plasma since they are produced in the early stage and propagate through the medium. The Compact Muon Solenoid (CMS) detector at the LHC is ideally suited to measure muon pairs from quarkonia in the high-multiplicity environment of nucleus-nucleus collisions. During the 2011 heavy-ion run, CMS has recorded an integrated luminosity of about 150~$\mu$b$^{-1}$, which is about a factor of twenty higher compared to the 2010 heavy-ion data. With this significantly larger data sample, CMS has analyzed the nuclear modification factors of prompt $J/\psi$, non-prompt $J/\psi$ from B mesons, $\psi$(2S) and separated three upsilon states (1S, 2S, 3S) in PbPb collisions at $\sqrt{s_{_{NN}}}=2.76$~TeV.