Observation of B+ -> psi(3770) K+

  • 23 July 2003
Abstract
We report the first observation of the decay B+ -> psi(3770)K+ where psi(3770) is reconstructed in the D0D0-bar and D+D- decay channels. The obtained branching fraction is Br(B+ -> psi(3770) K+)=(0.48+-0.11+-0.12)*10^{-3}. We have measured the branching ratio for the decay B+ -> D0D0-bar K+ to be (1.17+-0.21+-0.25)*10^{-3}. We have set a 90% confidence level upper limit of 0.79*10^{-3} for the decay B+ -> D+D-K+. The analysis is based on 88 fb^{-1} of data collected at the Upsilon(4S) resonance by the Belle detector at the KEKB asymmetric-energy e+e- collider.

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