Gluonic mesons in \(J/\psi\) radiative decay

  • Xue–Qian Li
  • Philip R. Page
Theoretical physics


Two–gluon coupling of gluonic mesons is estimated in a spectator model to be considerably larger than that of \(Q\bar{Q}\). As an example of a gluonic meson that may be produced in \(J/\psi\) radiative decay, we analyse \(\eta(1760)\). We deduce from experimental data that its branching ratio to two gluons is bounded, \(0.4\pm 0.3 \stackrel{<}{\scriptstyle \sim} BR(\eta(1760)\rightarrow gg)\stackrel{<}{\scriptstyle \sim} 0.9\pm 0.3\), consistent with a gluonic meson, but not compelling it. We propose further tests, and estimate the two–photon coupling of \(\eta(1760)\) to be \(1.4\pm 0.7\) keV.


Experimental Data Radiative Decay Spectator Model Gluon Coupling 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • Xue–Qian Li
    • 1
  • Philip R. Page
    • 2
  1. 1. Particle Theory, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, UK GB
  2. 2. Department of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UK (e-mail: Tel.: (757) 2695028. Fax.: (757) 2697002) GB

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