Phys. Rev. Lett. 82, 3020 - 3024 (1999)

First Observation of the Decay B⁰ → D^+D^-

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M. Artuso et al. (CLEO Collaboration)
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Received 16 November 1998

We have observed four fully reconstructed B⁰→D^*+D^*- candidates in 5.8×10⁶ ϒ(4S)→BB̅ decays recorded with the CLEO detector. The background is estimated to be 0.31±0.10 events. The probability that the background could produce four or more signal candidates with the observed distribution among D^*+ and D^*- decay modes is 1.1×10^-4. The measured decay rate, B(B⁰→D^*+D^*-) = [6.2_-2.9^+4.0(stat)±1.0(syst)]×10^-4, is large enough for this decay mode to be of interest for the measurement of a time-dependent CP asymmetry.

URL: http://link.aps.org/doi/10.1103/PhysRevLett.82.3020
DOI: 10.1103/PhysRevLett.82.3020
PACS: 13.25.Hw, 11.30.Er

^* Permanent address: University of Cincinnati, Cincinnati, OH 45221.
^† Permanent address: University of Texas, Austin, TX 78712.
^‡ Permanent address: Yonsei University, Seoul 120-749, Korea.

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Phys. Rev. Lett. 82, 3020 - 3024 (1999)

First Observation of the Decay B0 → D*+D*-

First Observation of the Decay B⁰ → D^+D^-