Study of the process $e^+e^-\toηγ$ in the center-of-mass energy range 1.07--2.00 GeV
hep-ex
/ Authors
M. N. Achasov, V. M. Aulchenko, A. Yu. Barnyakov, K. I. Beloborodov, A. V. Berdyugin, A. G. Bogdanchikov, A. A. Botov, T. V. Dimova, V. P. Druzhinin, V. B. Golubev
and 22 more authors
K. A. Grevtsov, L. V. Kardapoltsev, A. G. Kharlamov, D. P. Kovrizhin, I. A. Koop, A. A. Korol, S. V. Koshuba, A. P. Lysenko, K. A. Martin, A. E. Obrazovsky, E. V. Pakhtusova, E. A. Perevedentsev, A. L. Romanov, S. I. Serednyakov, Z. K. Silagadze, A. N. Skrinsky, I. K. Surin, Yu. A. Tikhonov, A. V. Vasiljev, P. Yu. Shatunov, Yu. M. Shatunov, D. A. Shtol
/ Abstract
The $e^+e^-\toηγ$ cross section has been measured in the center-of-mass energy range 1.07--2.00 GeV using the decay mode $η\to 3π^0$, $π^0\to γγ$. The analysis is based on 36 pb$^{-1}$ of integrated luminosity collected with the SND detector at the VEPP-2000 $e^+e^-$ collider. The measured cross section of about 35 pb at 1.5 GeV is explained by decays of the $ρ(1450)$ and $φ(1680)$ resonances.