First Observation of the Decay $B^{0}\to D^{*+}D^{*-}$

Details First Observation of the Decay $B^{0}\to D^{*+}D^{*-}$ First Observation of the Decay $B^{0}\to D^{*+}D^{*-}$

1998-11-16

arxiv.org/abs/hep-ex/9811027v1

Phys.Rev.Lett.82:3020-3024,1999

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, postscript file also available through http://w4.lns.cornell.edu/public/CLNS

Scientific paper

10.1103/PhysRevLett.82.3020

We have observed four fully reconstructed B0 -> D*+D*- candidates in 5.8 million Upsilon(4S) -> BBbar 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 X 10^{-4}. The measured decay rate, Br(B0 -> D*+D*-) = [6.2 +4.0-2.9 (stat) +- 1.0(syst)] X 10^{-4}, is large enough for this decay mode to be of interest for the measurement of a time-dependent CP asymmetry.

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