Search for the process $\mathbf{\it e^+e^-\to\eta^{\prime}\gamma}$ in the energy range $\mathbf{\it \sqrt{s}}$ = 1.075 -- 2 GeV
/ Authors
M. Achasov, A. Barnyakov, E. V. Bedarev, K. Beloborodov, A. Berdyugin, A. Bogdanchikov, A. Botov, T. Dimova, V. Druzhinin, V. Zhabin
and 27 more authors
Yu.M.Zharinov, L. Kardapoltsev, A. Kasaev, A. A. Kattsin, A. N. Kyrpotin, D. Kovrizhin, I. Koop, A. A. Korol’, A. Kupich, A. Kryukov, N. Melnikova, N. Muchnoy, A. Obrazovsky, E. Pakhtusova, K. Pugachev, S. Rastigeev, Y. Rogovsky, A. Senchenko, S. Serednyakov, Z. Silagadze, I. Surin, Y. Usov, A. Kharlamov, D.E.Chistyakov, Y. Shatunov, S. P. Sherstyuk, D. Shtol
/ Abstract
The results of the search for the $e^+e^-\to\eta^{\prime}\gamma$ process in the center-of-mass energy range from 1.075 to 2 GeV are presented. We analyze data with an integral luminosity of 746 pb$^{-1}$ accumulated with the SND detector at the $e^+e^-$ collider VEPP-2000 in 2010--2024. The $\eta^{\prime}\to\eta\pi^0\pi^0$ decay is used in the analysis, with the subsequent $\eta$ and $\pi^0$ decays into $\gamma\gamma$. Upper limits not exceeding 13 pb have been set on the $e^+e^-\to\eta^{\prime}\gamma$ cross section at the 90\% confidence level.