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

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

2009-09-11

arxiv.org/abs/0909.2087v2

Phys.Lett.B685:27-32,2010

Physics

High Energy Physics

High Energy Physics - Experiment

11 pages, 4 figures

Scientific paper

10.1016/j.physletb.2010.01.063

We report the first observation of $\mPJpsi \to \mPeta\mPKst\mAPKst$ decay in a $\mPJpsi$ sample of 58 million events collected with the BESII detector. The branching fraction is determined to be $(1.15 \pm 0.13 \pm 0.22)\times 10^{-3}$. The selected signal event sample is further used to search for the $\mPY$ resonance through $\mPJpsi \to \mPeta \mPY, \mPY\to\mPKst\mAPKst$. 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.

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