Improved measurement of B0bar --> Ds-D+ and search for B0bar --> Ds+Ds- at Belle

Details Improved measurement of B0bar --> Ds-D+ and search for B0bar --> Ds+Ds- at Belle Improved measurement of B0bar --> Ds-D+ and search for B0bar --> Ds+Ds- at Belle

2007-03-27

arxiv.org/abs/hep-ex/0703040v2

Phys.Rev.D75:091102,2007

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 2 figures, Submitted to Physical Review D, Rapid Communications

Scientific paper

10.1103/PhysRevD.75.091102

We reconstruct B0bar --> Ds-D+ decays using a sample of 449 x 10^6 BBbar pairs recorded by the Belle experiment, and measure the branching fraction to be Br(B0bar --> Ds-D+)=[7.5 +- 0.2(stat) +- 0.8(syst) +- 0.8(Br's)] x 10^(-3). A search for the related decay B0bar --> Ds+Ds- is also performed. Since we observe no statistically significant signal an upper limit on the branching fraction is set at 3.6 x 10^(-5) (90% C.L.).

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