Measurement of the production cross section ratio of X(3872) and psi(2S) in the decays to J/psi pi+ pi- in pp collisions at sqrt(s) = 7 TeV

A measurement of the ratio of the production cross sections for the $X(3872)$ and the $\psi(2S)$ resonances in $pp$ collisions at 7 TeV, using data recorded with the CMS experiment in 2010 corresponding to an integrated luminosity of 40 pb$^{-1}$, is presented. The resonances are reconstructed in their decays to $J/\psi \pi^+ \pi^-$ and with the subsequent decay of the $J/\psi$ candidates to two muons. The ratio of the cross sections times the branching fractions for these decay channels in the kinematic region $p_t(X)>8$ GeV and $|y(X)|<2.2$ is measured to be $R = 0.087 \pm 0.017 (stat.) \pm 0.009 (syst.)$.