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

Abstract

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)Γ_{γγ}B(X -> pi+ pi- J/psi) < 12.9 eV and Γ_{ee}B(X -> pi+ pi- J/psi) < 8.3 eV.

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

References in corpus (4)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Diagnostic Decays of the X(3872)
• Heavy quark spin selection rule and the properties of the X(3872)
• A phenomenological analysis of the longitudinal structure function at small $x$ and low $Q^2$

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• Glueballs, Hybrids, Multiquarks. Experimental facts versus QCD inspired concepts
• New Charmonium States in QCD Sum Rules: a Concise Review
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• Four-Quark Hadrons: an Updated Review
• Pion Interactions in the X(3872)
• A chromomagnetic mechanism for the X(3872) resonance
• An Alternative Interpretation of X(3872)
• $X(3872)\to D\bar{D}\gamma$ decays and the structure of X(3872)
• Radiative Return Capabilities of a High-Energy, High-Luminosity $e^{+}{e}^{-}$ Collider
• Evidence for $X(3872)\to J/\psi {\pi }^{+}{\pi }^{-}$ produced in single-tag two-photon interactions
• The X(3872) Meson and "Exotic" Spectroscopy at CDF II
• Search for resonances decaying to eta_c pi+ pi- in two-photon interactions