Glueballs and Hybrid Mesons

Abstract

The status of non-perturbative QCD calculations for mesons with gluonic excitation is presented. Lattice results for the glueball spectrum are reviewed. For hybrid mesons, the heavy quark results are summarised and new results are presented for light quarks. Preliminary results for the spectrum of light-quark hybrid mesons indicate substantial mixing with quark model states for non-exotic $J^{PC}$. For the exotic $J^{PC}$ hybrid mesons, the $J^{PC}=1^{-+}$, $0^{+-}$ and $2^{+-}$ states are explored.

Comments: 14 pages, latex, 5 postscript figures; Review presented at the Rencontre de Physique `Results and Perspectives in Particle Physics', La Thuile, March 4 1996