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Measurement of relative branching fractions of B decays to $\psi(2S)$ and $J/\psi$ mesons

Abstract : The relative rates of B-meson decays into $J/\psi$ and $\psi(2S)$ mesons are measured for the three decay modes in pp collisions recorded with the LHCb detector. The ratios of branching fractions ($\mathcal{B}$) are measured to be \frac{\mathcal{B}(B^+ \to \psi(2S) K^+)}{\mathcal{B}(B^+ \to J/\psi K^+)} &=& 0.594 \pm 0.006 (stat) \pm 0.016 (syst) \pm 0.015 (R_{\psi}), \frac{\mathcal{B}(B^0 \to \psi(2S) K^{*0})}{\mathcal{B}(B^0 \to J/\psi K^{*0})} &=& 0.476 \pm 0.014 (stat) \pm 0.010 (syst) \pm 0.012\,(R_{\psi}), \frac{\mathcal{B}^{0}_{s}(B^0_s \to \psi(2S)\phi)}{\mathcal{B}(B^0_s \to J/\psi\phi)} &=& 0.489 \pm 0.026 (stat) \pm 0.021 (syst) \pm 0.012\,(R_{\psi}) where the third uncertainty is from the ratio of the $\psi(2S)$ and $J/\psi$ branching fractions to $\mumu$.
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http://hal.in2p3.fr/in2p3-00697161
Contributor : Claudine Bombar <>
Submitted on : Monday, May 14, 2012 - 4:31:26 PM
Last modification on : Friday, November 20, 2020 - 3:30:14 PM

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R. Aaij, I. de Bonis, D. Decamp, Ph. Ghez, P. Hopchev, et al.. Measurement of relative branching fractions of B decays to $\psi(2S)$ and $J/\psi$ mesons. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2012, 72, pp.2118. ⟨10.1140/epjc/s10052-012-2118-7⟩. ⟨in2p3-00697161⟩

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