An upper limit for the radiative decay width of the J/ψ resonance into η′(958)+γ

Summary  We present the results of a search performed at ADONE for the reaction e++e−→J/ψ→η′(958)+γ. No evidence was found for such a reaction. The upper limit for the decay is $$\Gamma _{J/\psi \to \eta ^\prime \eta< 0.50} $$ keV (90% CL).