A search for the process $e^{+}{e}^{-}\to {\eta }^{\prime }$ has been performed with the SND detector at the VEPP-2000 $e^{+}{e}^{-}$ collider. The data were accumulated at the center-of-mass energy of $957.78\pm 0.06\mathrm{MeV}$ with an integrated luminosity of about $2.9{\mathrm{pb}}^{-1}$. For reconstruction of the ${\eta }^{\prime }$ meson, five decay chains have been used: ${\eta }^{\prime }\to \eta {\pi }^{+}{\pi }^{-}$ followed by the $\eta$ decays to $\gamma \gamma$ and $3{\pi }^0$ and ${\eta }^{\prime }\to \eta {\pi }^0{\pi }^0$ followed by the $\eta$ decays to ${\pi }^{+}{\pi }^{-}{\pi }^0$, $\gamma \gamma$, and $3{\pi }^0$. As a result, the following upper limit has been set on the ${\eta }^{\prime }$ electronic width: ${\mathrm{\Gamma }}_{{\eta }^{\prime }\to e^{+}{e}^{-}}<0.0020\mathrm{eV}$ at the 90% confidence level.

• Received 7 April 2015

DOI:https://doi.org/10.1103/PhysRevD.91.092010