Pseudoscalar-glueball production inψ→γX,ϒ→γX,e+e−→e+e−Xandpp→X

Saturation of the observed rate and spectrum of $\psi \to \gamma +\mathrm{hadrons}$ by a 2-GeV $0^{-}$ "glueball" $G$, and the use of SU(3)×SU(3) Ward identities [incorporating the U(1) axial anomaly] implies the possibility of a substantial cross section (∼0.5 nb) for the process $\mathrm{ee}\to \mathrm{eeG}$. As a consequence, the predominance of $K\overline{K}\pi$, $\eta \left({\eta }^{\prime }\right)\pi \pi$, and/or $4\pi$ final states is expected in both these reactions. A discussion is presented of the role of $G$ production in $\Upsilon \to \gamma +\mathrm{hadrons}$, and in the rise of ${\sigma }_{\mathrm{pp}}^{\mathrm{tot}}$ at CERN ISR energies in the range $20<\mathrm{}\sqrt{s}<50\mathrm{}$ GeV.