Study of the process $e^+e^-\toωηπ^0$ in the energy range $\sqrt{s} <2$ GeV with the SND detector
hep-ex
/ Authors
M. N. Achasov, V. M. Aulchenko, A. Yu. Barnyakov, K. I. Beloborodov, A. V. Berdyugin, D. E. Berkaev, A. G. Bogdanchikov, A. A. Botov, T. V. Dimova, V. P. Druzhinin
and 26 more authors
V. B. Golubev, L. V. Kardapoltsev, A. G. Kharlamov, I. A. Koop, A. A. Korol, D. P. Kovrizhin, S. V. Koshuba, A. S. Kupich, A. P. Lysenko, N. A. Melnikova, K. A. Martin, E. V. Pakhtusova, A. E. Obrazovsky, E. A. Perevedentsev, Yu. A. Rogovsky, S. I. Serednyakov, Z. K. Silagadze, Yu. M. Shatunov, P. Yu. Shatunov, D. A. Shtol, A. N. Skrinsky, I. K. Surin,
/ Abstract
The process $e^+e^-\toωηπ^0$ is studied in the energy range $1.45-2.00$ GeV using data with an integrated luminosity of 33 pb$^{-1}$ accumulated by the SND detector at the $e^+e^-$ collider VEPP-2000. The $e^+e^-\toωηπ^0$ cross section is measured for the first time. The cross section has a threshold near 1.75 GeV. Its value is about 2 nb in the energy range $1.8-2.0$ GeV. The dominant intermediate state for the process $e^+e^- \to ωηπ^0$ is found to be $ωa_0(980)$.