Measurement of the decays Bs0→J/ψφ(1020), Bs0→J/ ψf2′(1525) and Bs0→J/ψK+K- at Belle

We report a measurement of the branching fraction of the decay ${B}_{s}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\phi}(1020)$, evidence and a branching fraction measurement for ${B}_{s}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}{f}_{2}^{\ensuremath{'}}(1525)$, and the determination of the total ${B}_{s}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}{K}^{+}{K}^{\ensuremath{-}}$ branching fraction, including the resonant and nonresonant contributions to the ${K}^{+}{K}^{\ensuremath{-}}$ channel. We also determine the $S$-wave contribution within the $\ensuremath{\phi}(1020)$ mass region. The absolute branching fractions are $\mathcal{B}[{B}_{s}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\phi}(1020)]=(1.25\ifmmode\pm\else\textpm\fi{}0.07(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.08(\mathrm{syst})\ifmmode\pm\else\textpm\fi{}0.22({f}_{s}))\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$, $\mathcal{B}[{B}_{s}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}{f}_{2}^{\ensuremath{'}}(1525)]=(0.26\ifmmode\pm\else\textpm\fi{}0.06(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.02(\mathrm{syst})\ifmmode\pm\else\textpm\fi{}0.05({f}_{s}))\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$, and $\mathcal{B}[{B}_{s}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}{K}^{+}{K}^{\ensuremath{-}}]=(1.01\ifmmode\pm\else\textpm\fi{}0.09(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.10(\mathrm{syst})\ifmmode\pm\else\textpm\fi{}0.18({f}_{s}))\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$, where the last systematic error is due to the branching fraction of $b\overline{b}\ensuremath{\rightarrow}{B}_{s}^{(*)}{B}_{s}^{(*)}$. The branching fraction ratio is found to be $\mathcal{B}[{B}_{s}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}{f}_{2}^{\ensuremath{'}}(1525)]/\phantom{\rule{0ex}{0ex}}\mathcal{B}[{B}_{s}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\phi}(1020)]=(21.5\ifmmode\pm\else\textpm\fi{}4.9(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}2.6(\mathrm{syst}))%$. All results are based on a $121.4\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data sample collected at the $\ensuremath{\Upsilon}(5S)$ resonance by the Belle experiment at the KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider.