Gluonic Mesons in J/Psi Radiative Decay
High Energy Physics - Phenomenology
2011-09-13 v2
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.
Cite
@article{arxiv.hep-ph/9610250,
title = {Gluonic Mesons in J/Psi Radiative Decay},
author = {Philip R. Page and Xue-Qian Li},
journal= {arXiv preprint arXiv:hep-ph/9610250},
year = {2011}
}
Comments
9 pages, LaTeX, 1 postscript figure, uses epsf. Rewording of conclusions, and withdrawal of a table