Have Gluonic Excitations Been Found?

Abstract

New experimental information on the non-exotic J^PC = 0^-+ isovector seen at 1.8 GeV by VES yields convincing evidence of its excited gluonic (hybrid) nature when a critical study of alternative quarkonium assignments is made in the context of ^3 P_0 decay by flux-tube breaking. Production of this gluonic excitation via meson exchange is promising, although its two photon production vanishes.

Comments: 2 pages, appeared in the Proceedings of XIV International Conference on Particles and Nuclei (PANIC96, Williamsburg, 22-28 May 1996), LaTeX, sprocl.sty included