Search for B0 -> J/psi D0bar and B+ -> J/psi D0bar pi+ decays

Details Search for B0 -> J/psi D0bar and B+ -> J/psi D0bar pi+ decays Search for B0 -> J/psi D0bar and B+ -> J/psi D0bar pi+ decays

2005-03-22

arxiv.org/abs/hep-ex/0503037v2

Phys.Rev.D71:091107,2005

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, 2 figures, This version is accepted for publication by Phys. Rev. D Rapid Communications

Scientific paper

10.1103/PhysRevD.71.091107

We report the results of a search for the decay modes B0 -> J/psi D0bar and B+ -> J/psi D0bar pi+. The analysis is based on 140 $\rm fb^{-1}$ of data accumulated by the Belle detector at the KEKB asymmetric-energy $e^{+} e^{-}$ collider. No significant signals are observed and we determine the branching fraction upper limits B(B0 -> J/psi D0bar) < 2.0 10^{-5} and B(B+ -> J/psi D0bar pi+) < 2.5 10^{-5} at 90% confidence level. These results rule out the explanation of the excess in the low momentum region of the inclusive J/psi spectrum as intrinsic charm content in the B meson. The branching fractions of the corresponding non-resonant decay channels are also reported.

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