Study of Resonances in Exclusive B Decays to Dbar(*)D(*)K

Abstract

We present a study of resonances in exclusive decays of $B$ mesons to ${\bar{D}}^{(\ast )}{D}^{(\ast )}K$. We report the observation of the decays $B \to \Dbar^{(*)} D^+_{s1}(2536)$ where the $D_{s1}^{+}(2536)$ is reconstructed in the $D^{\ast 0}{K}^{+}$ and $D^{\ast +}{K}_S^0$ decay channels. We report also the observation of the decays $B\to \psi (3770)K$ where the $\psi (3770)$ decays to $\Dbar^0 D^0$ and $D^{-}{D}^{+}$. In addition, we present the observation of an enhancement for the $\Dbar^{*0} D^0$ invariant mass in the decays $B \to \Dbar^{*0} D^0 K$, at a mass of $(3875.1{}_{-0.5}^{+0.7}\pm 0.5)$ MeV/$c^2$ with a width of $(3.0{}_{-1.4}^{+1.9}\pm 0.9)$ MeV (the first errors are statistical and the second are systematic). Branching fractions and spin studies are shown for the three resonances. The results are based on 347 fb${}^{-1}$ of data collected with the BaBar detector at the PEP-II $B$ factory.

8 pages, 2 figures; submitted to Phys. Rev. D (Rapid Communications); v2 corrects treatment of errors on X(3872) mass and width

References in corpus (2)

• Measurements of the braching fractions for psi(3770)--> D0D0-bar,D+D-,DD-bar$ and the resonance parameters of psi(3770) and psi(2S)
• A Precision Determination of the D^0 Mass

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