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Study of J/Psi decays into eta Kstar Kstar-bar

High Energy Physics - Experiment 2010-02-18 v2
Authors: The BES Collaboration , M. Ablikim
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Abstract

We report the first observation of \mPJpsi→\mPeta\mPKst\mAPKst\mPJpsi \to \mPeta\mPKst\mAPKst decay in a \mPJpsi\mPJpsi sample of 58 million events collected with the BESII detector. The branching fraction is determined to be (1.15±0.13±0.22)×10−3(1.15 \pm 0.13 \pm 0.22)\times 10^{-3}. The selected signal event sample is further used to search for the \mPY\mPY resonance through \mPJpsi→\mPeta\mPY,\mPY→\mPKst\mAPKst\mPJpsi \to \mPeta \mPY, \mPY\to\mPKst\mAPKst. No evidence of a signal is seen. An upper limit of \mathrm{Br}(\mPJpsi \to \mPeta \mPY)\cdot\mathrm{Br}(\mPY\to\mPKst\mAPKst) < 2.52\times 10^{-4} is set at the 90% confidence level.

Keywords

J/Psi decay eta K* K*bar branching fraction Y resonance search BESII detector

Cite

@article{arxiv.0909.2087,
  title  = {Study of J/Psi decays into eta Kstar Kstar-bar},
  author = {The BES Collaboration and M. Ablikim},
  journal= {arXiv preprint arXiv:0909.2087},
  year   = {2010}
}

Comments

11 pages, 4 figures

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