A Study of the Rare Decays $B^0\to D_s^{(\ast )+}{\pi }^{-}$ and $B^0\to D_s^{(\ast )-}{K}^{+}$

Abstract

We report evidence for the decays $B^0\to D_s^{+}{\pi }^{-}$ and $B^0\to D_s^{-}{K}^{+}$ and the results of a search for $B^0\to D_s^{\ast +}{\pi }^{-}$ and $B^0\to D_s^{\ast -}{K}^{+}$ in a sample of 84 milion Y(4S) decays into $B\bar{B}$ pairs collected with the BaBar detector at the PEP II asymmetric-energy $e^{+}{e}^{-}$ storage ring. We measure the branching fraction Br($B^0\to D_s^{+}{\pi }^{-})=3.2\pm 0.9(stat.)\pm 1.0(syst.)$. and Br($B^0\to D_s^{+}{\pi }^{-})=3.2\pm 1.0(stat.)\pm 1.0(syst.)$. We also set 90% C.L. limits BR($B^0\to D_s^{\ast +}{\pi }^{-})<4.1\times 10^{-5}$ at 90% C.L and BR($B^0\to D_s^{\ast -}{K}^{+})<2.5\times 10^{-5}$ at 90% C.L.

7 pages, 3 encapsulated postscript figures, submitted to PRL

References in corpus (8)

• The BABAR Detector
• Observation of Large CP Violation in the Neutral B Meson System
• Observation of CP violation in the B^0 meson system
• Clean CKM Information from Bd(t) -> D(*)+/- pi-/+
• Annihilation, Rescattering, and CP Asymmetries in B Meson Decays
• Measurement of Branching Fractions and Search for CP-Violating Charge Asymmetries in Charmless Two-Body B Decays into Pions and Kaons
• Observation of Ds+ K- and evidence for Ds+ pi- final states in neutral B decays
• Measurement of |V_{ub}/V_{cb}| (and |V_{ub}|) in Exclusive Nonleptonic Decays, \bar{B}^0 --> D_s^{(*)-}(π^+,ρ^+) and \bar{B}^0 --> D_s^{(*)-}D^{(*)+}

Cited by in corpus (20)

• Final State Interactions in Hadronic B Decays
• B Decays as Spectroscope for Charmed Four-quark States
• Impact of tag-side interference on time-dependent CP asymmetry measurements using coherent B0 B0bar pairs
• Strong Phases and Factorization for Color Suppressed Decays
• Partial waves of baryon-antibaryon in three-body B meson decay
• Measurement of Time-Dependent CP-Violating Asymmetries and Constraints on sin(2 beta+gamma) with Partial Reconstruction of B->D*-+pi+- Decays
• Using untagged B^0 -> D K_S to determine gamma
• Measurements of CP Violation in $B^0\to D^{\ast -}{\pi }^{+}$ and $B^0\to D^{-}{\pi }^{+}$ Decays
• Search of $D_{sJ}^{\ast }$ mesons in $B$ meson decays
• Measurement of the Branching Fractions of the Rare Decays B0->Ds(*)+pi-, B0->Ds(*)+rho-, and B0->Ds(*)-K(*)+
• Measurement of Time-Dependent CP Asymmetry in B0->D^(*)+-pi-+ Decays and Constraints on |sin(2beta+gamma)|
• Measurement of Time-Dependent CP Asymmetries and Constraints on sin(2beta+gamma) with Partial Reconstruction of B0 -> D*-+ pi+- Decays
• Rescattering effects in B_{u,d,s}(bar) to D P, D(bar) P decays
• Improved measurement of B0bar --> Ds-D+ and search for B0bar --> Ds+Ds- at Belle
• Final-State Phases in $B\to$ Baryon-Antibaryon Decays
• Implications of Bbar to D0 h0 Decays on Bbar to D Kbar, Dbar Kbar Decays
• Observation of Decays B0->D_s(*)+pi- and B0->D_s(*)-K+
• Weak Annihilation Topologies and Final State Interactions in D -> PP Decays
• Evidence for the Rare Decay B+ --> Ds+ pi0
• Measurement of Vub at Belle