Study of the Suppressed Decays $B^{-}\to [K^{+}{\pi }^{-}{]}_D{K}^{-}$ and $B^{-}\to [K^{+}{\pi }^{-}{]}_D{\pi }^{-}$

Abstract

We report a study of the suppressed decays $B^{-}\to [K^{+}{\pi }^{-}{]}_D{K}^{-}$ and $B^{-}\to [K^{+}{\pi }^{-}{]}_D{\pi }^{-}$, where $[K^{+}{\pi }^{-}{]}_D$ indicates that the $K^{+}{\pi }^{-}$ pair originates from a neutral $D$ meson. These decay modes are sensitive to the Unitarity Triangle angle ${\varphi }_3$. We use a data sample containing 275 million $B\bar{B}$ pairs recorded at the ${\rm Y}(4S)$ resonance with the Belle detector at the KEKB asymmetric $e^{+}{e}^{-}$ storage ring. The signal for $B^{-}\to [K^{+}{\pi }^{-}{]}_D{K}^{-}$ is not statistically significant, and we set a limit $r_B<0.27$ at 90% confidence level, where $r_B$ is the magnitude of the ratio of amplitudes $|A(B^{-}\to {\bar{D}}^0{K}^{-})/A(B^{-}\to D^0{K}^{-})|$. We observe a signal with $6.4\sigma$ statistical significance in the related mode, $B^{-}\to [K^{+}{\pi }^{-}{]}_D{\pi }^{-}$.

6 pages, 3 figures, 2 tables. Submitted to Phys. Rev. Lett

References in corpus (2)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Evidence for Direct CP Violation in B0 -> K+- pi-+ Decays

Cited by in corpus (7)

• B, D and K decays
• Search for b->u transitions in B- -> D0 K- and B- -> D*0 K-
• Measurements of the branching fractions and CP-asymmetries of B- --> D0_(CP) K- decays
• Measurement of CP Observables for the Decays B+/- --> D0_CP K*+/-
• Study of the suppressed B meson decay B^- -> D K^-, D -> K^+ π^-
• Time-dependent Dalitz plot analysis of B0 -> D-(+) K0 Pi+(-) decays
• Search for b--> u transitions in B- -> [K+pi-pi0]_D K-