Observations of $B^0_s \rightarrow\psi(2S)\eta$ and $B^0_{(s)}\rightarrow\psi(2S)\pi^+\pi^-$ decays - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Nuclear Physics B Year : 2013

Observations of $B^0_s \rightarrow\psi(2S)\eta$ and $B^0_{(s)}\rightarrow\psi(2S)\pi^+\pi^-$ decays

R. Aaij
  • Function : Author
J. He
J. Cogan
O. Leroy
J. Serrano


First observations of the $B^0_s \rightarrow \psi(2S) \eta$, $B^0 \rightarrow \psi(2S) \pi^+ \pi^-$ and $B^0_s \rightarrow \psi(2S) \pi^+ \pi^-$ decays are made using a dataset corresponding to an integrated luminosity of 1.0~$fb^{-1}$ collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}=7$ TeV. The ratios of the branching fractions of each of the $\psi(2S)$ modes with respect to the corresponding $J/\psi$ decays are \[ \frac{\mathcal{B}(B^0_s \rightarrow \psi(2S) \eta) }{\mathcal{B}(B^0_s \rightarrow J/\psi \eta)} =0.83\pm0.14\,(stat)\pm0.12\,(syst)\pm0.02\,(\mathcalB}), \] \[ \frac{\mathcal{B}(B^0 \rightarrow \psi(2S) \pi^+ \pi^-)}{\mathcal{B}(B^0 \rightarrow J/\psi \pi^+ \pi^-)} =0.56\pm0.07\,(stat)\pm0.05\,(syst)\pm0.01\,(\mathcal{B}), \] \[ \frac{\mathcal{B}(B^0_s \rightarrow \psi(2S) \pi^+ \pi^-)}{\mathcal{B}(B^0_s \rightarrow J/\psi \pi^+ \pi^-)} =0.34\pm0.04\,(stat)\pm0.03\,(syst)\pm0.01\,(\mathcal{B}), \] where the third uncertainty corresponds to the uncertainties of the dilepton branching fractions of the $J/\psi$ and $\psi(2S)$ meson decays.

Dates and versions

in2p3-00795048 , version 1 (27-02-2013)



R. Aaij, Y. Amhis, S. Barsuk, O. Callot, J. He, et al.. Observations of $B^0_s \rightarrow\psi(2S)\eta$ and $B^0_{(s)}\rightarrow\psi(2S)\pi^+\pi^-$ decays. Nuclear Physics B, 2013, 871, pp.403-419. ⟨10.1016/j.nuclphysb.2013.03.004⟩. ⟨in2p3-00795048⟩
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