This is the web page summarizing the blessed result for the measurement of the ratio of branching fractions. The measurement is done using 355 pb^-1 CDF data set and have been blessed in the B Physics Meeting on Thursday Mar 14, 2006. We observed an exclusive Bs -> Ds Ds decay at 5.8σ confidence level and found:

f_s/f_d * BR(B_s → D_sD_s ) / BR(B⁰ → D_sD⁺) = 0.43 ± 0.11(Stat) ± 0.03(Syst) ± 0.10(BR)
BR(B_s → D_sD_s ) / BR(B⁰ → D_sD⁺ ) = 1.67 ± 0.41(Stat) ± 0.12(Syst) ± 0.24 (f_s/f_d) ± 0.39(BR)

Reconstructed Bd -> DsD+ where Ds -> φ π

There is a complete version of the results: ps.

Below the eps versions of all figures meant for downloads.

    Yields:

        Fig.  1        Bd  -> Ds D+ (φ π) Mass

        Fig.  2        Bd  -> Ds D+ (K^* K) Mass

        Fig.  3        Bd  -> Ds D+ (3 π) Mass

        Fig.  4        Bs  -> Ds Ds (φ π)(φ π) Mass

        Fig.  5        Bs  -> Ds Ds (φ π)(K^* K) Mass

        Fig.  6        Bs  -> Ds Ds (φ π)(3 π) Mass

        Fig.  7        Bs  -> Ds Ds (φ π)(φ π) Mass Wide Range

        Fig.  8        Bs  -> Ds Ds Three Modes Combined