Gluonic Mesons in J/Psi Radiative Decay

Abstract

The eta(1760) may be significantly produced in J/Psi radiative decay. We deduce from experimental data that its branching ratio to two gluons is bounded, 0.4 +- 0.3 < BR(eta(1760) -> gg) < 0.9 +- 0.3, consistent with gluonic admixture. Moreover, the expectation that there should be an isoscalar analogue of the gluonic (hybrid) meson candidate pi(1800) is argued to reinforce hybrid admixture in eta(1760). Two-gluon coupling of hybrids is estimated in a spectator model to be considerably larger than that of quarkonium. In addition, the two-photon coupling of eta(1760) is estimated to be 1.4 +- 0.7 keV.

9 pages, LaTeX, 1 postscript figure, uses epsf. Rewording of conclusions, and withdrawal of a table

References in corpus (2)

• Determining the Gluonic Content of Isoscalar Mesons
• Symmetrization Selection Rules

Cited by in corpus (10)

• Light Meson Spectroscopy
• Hybrid Meson Decay Phenomenology
• $X(1835)$ and $\eta (1760)$ observed by the BES Collaboration
• Pseudoscalar production at omega omega threshold in J/psi -> gamma omega omega
• Dispersive analysis of glueball masses
• First study of η_c, η(1760) and X(1835) production via η'π^+π^- final states in two-photon collisions
• Radiative production and decays of the exotic ${\eta }_1^{\prime }(1855)$ and its siblings
• A Study of the Roper Resonance as a Hybrid State from $J/\psi$ Decays
• Dispersive analysis of excited glueball states
• Study of two-photon decays of pseudoscalar mesons via $J/\psi$ radiative decays