We report on the first search with virtual photon-photon collisions for narrow, neutral resonances with even C parity in the mass range 4.5<W<19 GeV. The data were obtained via the process $e^{+}$$e^{\mathrm{-}}$→$e^{+}$$e^{\mathrm{-}}$${\gamma }^{\mathrm{*}}$${\gamma }^{\mathrm{*}}$→e ${}_{}{}^{+}{}_{}{}^{}e_{}^{\mathrm{-}}{}_{}{}^{}$R with both the scattered $e^{+}$ and $e^{\mathrm{-}}$ detected. We find upper limits (95% confidence level) for the partial decay width of a resonance into two photons, ranging from 50 keV at W=4.5 GeV to 10 MeV at W=19 GeV. These limits constrain theoretical models involving neutral composite bosons.

• Received 14 August 1986

DOI:https://doi.org/10.1103/PhysRevLett.57.3245