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| CMS-BPH-11-011 ; CERN-PH-EP-2013-014 | ||
| Measurement of the X(3872) production cross section via decays to $ \mathrm{J}/\psi \pi^+ \pi^-$ in pp collisions at $\sqrt{s}$ = 7 TeV | ||
| CMS Collaboration | ||
| 16 February 2013 | ||
| J. High Energy Phys. 04 (2013) 154 | ||
| Abstract: The production of the X(3872) is studied in pp collisions at $\sqrt{s}$ = 7 TeV, using decays to $J/\psi \pi^+ \pi^-$, where the $J/\psi$ decays to two muons. The data were recorded by the CMS experiment and correspond to an integrated luminosity of 4.8 inverse femtobarns. The measurements are performed in a kinematic range in which the X(3872) candidates have a transverse momentum 10 $\lt p_T \lt$ 50 GeV and rapidity abs(y) $\lt$ 1.2. The ratio of the X(3872) and $\psi$(2S) cross sections times their branching fractions into $J/\psi \pi^+ \pi^-$ is measured as a function of $p_T$. In addition, the fraction of X(3872) originating from B decays is determined. From these measurements the prompt X(3872) differential cross section times branching fraction as a function of $p_T$ is extracted. The $\pi^+ \pi^-$ mass spectrum of the $J/\psi \pi^+ \pi^-$ system in the X(3872) decays is also investigated. | ||
| Links: e-print arXiv:1302.3968 [hep-ex] (PDF) ; CDS record ; inSPIRE record ; Public twiki page ; HepData record ; CADI line (restricted) ; | ||
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Compact Muon Solenoid LHC, CERN |
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