First evidence for the annihilation decay mode $B^{+}\to D_s^{+}\varphi$

Abstract

Evidence for the hadronic annihilation decay mode $B^{+}\to D_s^{+}\varphi$ is found with greater than $3\sigma$ significance. The branching fraction and \CP asymmetry are measured to be \mathcal{B}(B^{+} \to D_s^{+}ϕ) &=& (1.87^{+1.25}_{-0.73}({\rm stat}) \pm 0.19 ({\rm syst}) \pm 0.32 ({\rm norm})) \times 10^{-6}, \mathcal{A}_{CP}(B^{+} \to D_s^{+}ϕ) &=& -0.01 \pm 0.41 ({\rm stat}) \pm 0.03 ({\rm syst}). The last uncertainty on $\mathcal{B}(B^{+}\to D_s^{+}\varphi )$ is from the branching fractions of the $B^{+}\to D_s^{+}\bar{D}{}^0$ normalization mode and intermediate resonance decays. Upper limits are also set for the branching fractions of the related decay modes $B_{(c)}^{+}\to D_{(s)}^{+}{K}^{\ast 0}$, $B_{(c)}^{+}\to D_{(s)}^{+}\bar{K}{}^{\ast 0}$ and $B_c^{+}\to D_s^{+}\varphi$, including the result $\mathcal{B}(B^{+}\to D^{+}{K}^{\ast 0})<1.8\times 10^{-6}$ at the 90% credibility level.

19 Pages, 3 figures and 4 tables

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• Efficient, reliable and fast high-level triggering using a bonsai boosted decision tree
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Cited by in corpus (15)

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• Amplitude analysis of $B^0\to {\bar{D}}^0{K}^{+}{\pi }^{-}$ decays
• Observations of ${\Lambda }_b^0\to \Lambda K^{+}{\pi }^{-}$ and ${\Lambda }_b^0\to \Lambda K^{+}{K}^{-}$ decays and searches for other ${\Lambda }_b^0$ and ${\Xi }_b^0$ decays to $\Lambda h^{+}{h}^{\prime -}$ final states
• Rescattering Contributions to rare B-Meson Decays
• Constraints on the unitarity triangle angle $\gamma$ from Dalitz plot analysis of $B^0\to D{K}^{+}{\pi }^{-}$ decays
• Measurement of the branching fractions of the decays Bs -> D0bar K- π+ and B0 -> D0bar K+ π-
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• First observation of the rare $B^{+}\to D^{+}{K}^{+}{\pi }^{-}$ decay
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• Radiative Penguin Decays at e^+ e^- Colliders