We have searched for narrow resonance peaks in the process $e^{+}$$e^{\mathrm{-}}$→γγ, utilizing a ${}_{}{}^{22}{}_{}{}^{}\mathrm{Na}$ ${\beta }^{+}$ source and a pair of Ge detectors to detect the final two γ’s. No statistically significant peak is observed at the center-of-mass energy of 1062 keV, where the heavy-ion-collision experiment at LBL has seen a peak. The upper limit to the quantity ${\Gamma }_{\mathrm{ee}}$${\Gamma }_{\gamma \gamma }$/Γ is 1.1×${10}^{\mathrm{-}4}$ eV at the 95% confidence level for a scalar or pseudoscalar resonance at 1062 keV/$c^2$. Similar upper limits are obtained in the mass region between 1045 and 1085 keV/$c^2$

• Received 20 July 1988

DOI:https://doi.org/10.1103/PhysRevLett.62.1091