CMS-BPH-14-002

CMS-BPH-14-002 ; CERN-PH-EP-2015-003
Measurement of the ratio $\mathcal{B}( \mathrm{B}^0_{s} \to \mathrm{J}/\psi\, \mathrm{f}_0(980))/\mathcal{B}(\mathrm{B}^0_{s} \to \mathrm{J}/\psi\, \phi(1020))$ in pp collisions at $\sqrt{s}$ = 7 TeV
CMS Collaboration
25 January 2015
Phys. Lett. B 756 (2016) 84
Abstract: The ratio $R_{\, \mathrm{f}_0 / \phi}$ of the branching fractions of the $\mathrm{B}^0_{s}$ meson to the CP-odd eigenstate $\mathrm{J}/\psi\, \mathrm{f}_0(980)$ and to $\mathrm{J}/\psi\, \phi(1020)$ is measured, where $\mathrm{J}/\psi \to \mu^+\mu^-$ , $\mathrm{f}_0 \to \pi^+\pi^-$ , and $\phi \to \mathrm{K}^+\mathrm{K}^-$ . The analysis is based on a data sample of pp collisions at a centre-of-mass energy of 7 TeV, collected by the CMS experiment, corresponding to an integrated luminosity of 5.3 fb $^{-1}$ . The result is $R_{\, \mathrm{f}_0 / \phi} = 0.140 \pm 0.013 \pm 0.018$ , where the first uncertainty is statistical and the second is systematic. This result is consistent with theoretical predictions and previous measurements of $R_{\, \mathrm{f}_0 / \phi}$ . It is the most precise measurement of the ratio to date.
Links: e-print arXiv:1501.06089 [hep-ex] (PDF) ; CDS record ; inSPIRE record ; CADI line (restricted) ;

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