Study of the process $e^{+}{e}^{-}\to \hat{I}\cdot \hat{I}\cdot {\hat{I}}^3$ in the energy range $\sqrt{s} = \mbox{1.17--2.00}$ GeV with the SND detector

Abstract

The process $e^{+}{e}^{-}\to \hat{I}\cdot \hat{I}\cdot {\hat{I}}^3$ is studied in the center-of-mass energy range 1.17-2.00 GeV using data with an integrated luminosity of 201 pb${}^{-1}$collected by the SND detector at the VEPP-2000 $e^{+}{e}^{-}$ collider. The $e^{+}{e}^{-}\to \hat{I}\cdot \hat{I}\cdot {\hat{I}}^3$ cross section is measured for the first time. It is shown that the dominant mechanism of this reaction is the transition through the $\ddot{I}•\hat{I}\cdot$ intermediate state. Our result on the $e^{+}{e}^{-}\to \hat{I}\cdot \hat{I}\cdot {\hat{I}}^3$ cross section is consistent with the $e^{+}{e}^{-}\to \ddot{I}•\hat{I}\cdot$ measurement in the $\ddot{I}•\to K^{+}{K}^{-}$ mode. The search for radiative processes contributing to the $e^{+}{e}^{-}\to \hat{I}\cdot \hat{I}\cdot {\hat{I}}^3$ cross section is performed, and no significant signal is observed.

6 pages, 3 figures, to be submitted to European Physical Journal C. arXiv admin note: text overlap with arXiv:2006.05465