English

First Observation of the Decay $B \to J/\psi \phi K$

High Energy Physics - Experiment 2010-04-08 v3
Authors: A. Anastassov , CLEO Collaboration
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Abstract

We present the first observation of the decay B->J/psi phi K. Using 9.6 million B meson pairs collected with the CLEO detector, we have observed 10 fully reconstructed B->J/psi phi K candidates, whereas the estimated background is 0.5+/-0.2 events. We obtain a branching fraction of Br(B->J/psi phi K) = (8.8+3.5/-3.0(stat)+/-1.3(syst))*10^-5. This is the first observed BB meson decay requiring the creation of an additional s sbar quark pair.

Keywords

B meson decay J/psi phi K branching fraction CLEO detector s sbar quark pair

Cite

@article{arxiv.hep-ex/9908014,
  title  = {First Observation of the Decay $B \to J/\psi \phi K$},
  author = {A. Anastassov and CLEO Collaboration},
  journal= {arXiv preprint arXiv:hep-ex/9908014},
  year   = {2010}
}

Comments

Changed to agree more closely with published version; 8 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS

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