Measurement of $B^0\to D_s^{-}{K}_S^0{\pi }^{+}$ and $B^{+}\to D_s^{-}{K}^{+}{K}^{+}$ branching fractions

Abstract

We report a measurement of the $B^0$ and $B^{+}$ meson decays to the $D_s^{-}{K}_S^0{\pi }^{+}$ and $D_s^{-}{K}^{+}{K}^{+}$ final states, respectively, using $657\times 10^{6}B\overline{B}$ pairs collected at the ${\rm Y}(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider. Using the $D_s^{-}\to \varphi {\pi }^{-}$, $K^{\ast }(892{)}^0{K}^{-}$ and $K_S^0{K}^{-}$ decay modes for the $D_s$ reconstruction, we measure the following branching fractions: $\mathcal{B}(B^0\to D_s^{-}{K}_S^0{\pi }^{+})=[0.47\pm 0.06(\mathrm{stat})\pm 0.05(\mathrm{syst})]\times 10^{-4}$ and $\mathcal{B}(B^{+}\to D_s^{-}{K}^{+}{K}^{+})=[0.93\pm 0.22(\mathrm{stat})\pm 0.10(\mathrm{syst})]\times 10^{-5}$. We find the ratio of the branching fraction of $B^{+}\to D_s^{-}{K}^{+}{K}^{+}$ to that of the analogous Cabibbo favored $B^{+}\to D_s^{-}{K}^{+}{\pi }^{+}$ decay to be ${\mathcal{R}}_{\mathcal{B}}=0.054\pm 0.013(\mathrm{stat})\pm 0.006(\mathrm{syst})$, which is consistent with the na\"ıve factorization model. We also observe a deviation from the three-body phase-space model for both studied decays.

13 pages, 4 figures, submitted to PRD

References in corpus (2)

• Measurement of $B\to D_s^{(\ast )}K\pi$ branching fractions
• The role of $D^{\star \star }$ in $B^{-}\to D_s^{+}{K}^{-}{\pi }^{-}$

Cited by in corpus (6)

• Implications of chiral symmetry on $S$-wave pionic resonances and the scalar charmed mesons
• The roles of the $T_{c\bar{s}0}(2900{)}^0$ and $D_0^{\ast }(2300)$ in the process $B^{-}\to D_s^{+}{K}^{-}{\pi }^{-}$
• Analysis of three-body charmed B meson decays under the factorization-assisted topological-amplitude approach
• Contributions of the kaon pair from $\rho (770)$ for the three-body decays $B\to DK\bar{K}$
• The role of $D_{(s)}^{\ast }$ and their contributions in $B_{(s)}\to D_{(s)}h{h}^{\prime }$ decays
• Resonant contributions to three-body $B_{(s)}\to [D^{(\ast )},{\bar{D}}^{(\ast )}]K^{+}{K}^{-}$ decays in the perturbative QCD approach