Quarkonium production measurements and searches for exotic quarkonia at CMS

The CMS experiment at the LHC studies conventional and exotic quarkonia. CMS measured the quarkonium polarization of prompt $\Psi$(nS) and $\Upsilon$(nS) states, using 2011 data taken in pp collisions at $\sqrt{s} = 7$~TeV. No strong polarization was observed in any of the states. The prompt $\Psi$(nS) differential production cross section was determined up to and even beyond 100~GeV. The production of X(3872) in its decay to J/$\psi \pi^+ \pi^-$ was also measured, using data taken in pp collisions at $\sqrt{s} = 7$~TeV. The cross section times the branching fraction of the X(3872) relative to the one of $\psi$(2S) and the fraction of X(3872) originating from B decays were determined. The prompt X(3872) differential cross section times branching fraction as a function of p$_{\mathrm T}$ was extracted. Furthermore, a search for the exotic quarkonium X$_{\mathrm b}$, decaying to $\Upsilon$(1S) $\pi^+ \pi^-$ in the mass range of 10 to 11~GeV, was conducted using data collected in pp collisions at $\sqrt{s} = 8$~TeV. No evidence of a X$_{\mathrm b}$ signal was observed. An upper limit on the relative inclusive production cross section times branching ratio of the X$_{\mathrm b}$ and $\Upsilon$(2S) states at was set.