Search for X(3872) in gamma gamma Fusion and ISR at CLEO

Details Search for X(3872) in gamma gamma Fusion and ISR at CLEO Search for X(3872) in gamma gamma Fusion and ISR at CLEO

2004-10-14

arxiv.org/abs/hep-ex/0410038v2

Phys.Rev.Lett.94:032004,2005

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages postscript,also available through http://www.lns.cornell.edu/public/CLNS/2004/, submitted to PRL

Scientific paper

10.1103/PhysRevLett.94.032004

We report on a search for the recently reported X(3872) state using 15.1 fb^{-1} e+ e- data taken in the \sqrt{s} = 9.46-11.30 GeV region. Separate searches for the production of X(3872) in untagged gamma-gamma fusion and e+ e- annihilation following initial state radiation (ISR) are made by taking advantage of the unique correlation of J/psi -> l+ l- in X(3872) decay to pi+ pi- J/psi. No signals are observed in either case, and 90% confidence upper limits are established as (2J+1)\Gamma_{\gamma\gamma}B(X -> pi+ pi- J/psi) < 12.9 eV and \Gamma_{ee}B(X -> pi+ pi- J/psi) < 8.3 eV.

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