  The Compact Muon Solenoid (CMS) has measured numerous quarkonium states via
their decays into muon pairs in pp and PbPb collisions at sqrt(s_NN) = 2.76
TeV. Quarkonia are especially relevant for studying the quark-gluon plasma
since they are produced at early times and propagate through the medium,
mapping its evolution. Non-prompt J/psi from b-hadron decays show a strong
suppression in the transverse momentum range (6.5 < p_T < 30 GeV/c) when
compared to the yield in pp collisions scaled by the number of inelastic
nucleon-nucleon collisions. This suppression is related to the in-medium
b-quark energy loss. In the same kinematic region, for prompt J/psi, a strong,
centrality-dependent suppression is observed in PbPb collisions. Such strong
suppression at high p_T has previously not been observed at RHIC. At
midrapidity (|y| < 1.6) and the same p_T region, inclusive psi(2S) are even
stronger suppressed than J/psi, whereas psi(2S) at forward rapidity (1.6 < |y|
< 2.4) and lower p_T (3 < p_T < 30 GeV/c) appear to be less suppressed than
J/psi, however, with large uncertainties that prevent a conclusion.
Furthermore, low-p_T Y(2S) and Y(3S) mesons are strongly suppressed in PbPb
collisions. The suppression of the Y(1S) state is smaller than the suppression
of the excited states and consistent with the suppression of the feed-down
contribution only.
