Study of the process $e^{+}{e}^{-}\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}\ddot{I}{€}^0\hat{I}\cdot$ in the c.m. energy range 1394--2005 MeV with the CMD-3 detector

Abstract

The cross section of the process $e^{+}{e}^{-}\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}\ddot{I}{€}^0\hat{I}\cdot$ has been measured using a data sample of 21.8 pb${}^{-1}$ collected with the CMD-3 detector at the VEPP-2000 $e^{+}{e}^{-}$ collider. 2769$\pm$95 signal events have been selected in the center-of-mass energy range 1394--2005 MeV. The production dynamics is dominated by the $\ddot{I}‰(782)\hat{I}\cdot$ and $\ddot{I}•(1020)\hat{I}\cdot$ intermediate states in the lower energy range, and by the $a_0(980)\ddot{I}(770)$ intermediate state at higher energies.

20 pages, 11 figures, 2 tables