Gluonic Mesons in J/Psi Radiative Decay

Details Gluonic Mesons in J/Psi Radiative Decay Gluonic Mesons in J/Psi Radiative Decay

1996-10-04

arxiv.org/abs/hep-ph/9610250v2

Eur.Phys.J.C1:579-583,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1007/s100520050106

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.

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