Measurement of the CP observables in Bs->DsK and first observation of Bsbar --> Ds^+K-pi+pi- and Bsbar --> D_{s1}(2536)^+ pi^-

Abstract

First measurements of the CP observables from a time-dependent analysis of ${\bar{B}}_s^0\to D_s^{+}{K}^{-}$ decays are reported. We also present the first observation of the ${\bar{B}}_{(s)}^0\to D_s^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$ and ${\bar{B}}_s^0\to D_s(2536{)}^{+}{\pi }^{-}$ decays. The ${\bar{B}}_s^0\to D_s^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$ decay can be used in a similar way to ${\bar{B}}_s^0\to D_s^{+}{K}^{-}$ to measure the weak phase $\gamma$.

arXiv comment11 pages, 6 figures, for the CKM 2012 Conference, Cincinnati, OH, Sept 28 - Oct 2, 2012