Results on quarkonia and heavy meson production in PbPb collisions by CMS experiment

This writeup summarizes the recent CMS results on the measurements of quarkonia states and heavy flavoured mesons in pp and PbPb collisions at LHC. The CMS has excellent muon detection capability allowing measurement of charmonia states for transverse momentum $p_T gt $ 3 GeV/$c$ while the three $\Upsilon$ states can be reconstructed starting at zero $p_T$. The nuclear modification factors of quarkonia states and the ratios of excited to ground states in PbPb collisions are measured. To characterize heavy quark energy loss, CMS measures nuclear modification factors of D$^0$ and B$^+$ mesons in PbPb collision. An overview of these measurements is given.