The $\ddot{I}•\to \hat{I}\cdot \ddot{I}{€}^0{\hat{I}}^3$ decay

Abstract

Rare radiative decay $\ddot{I}•\to \hat{I}\cdot \ddot{I}{€}^0{\hat{I}}^3$ was studied with SND detector at {VEPP-2M} electron-positron collider and its branching ratio was measured: $B(\ddot{I}•\to \hat{I}\cdot \ddot{I}{€}^0{\hat{I}}^3)=(0.88\pm 0.14\pm 0.09)\cdot 10^{-4}$. Significant contribution of the $a_0(980){\hat{I}}^3$ intermediate state was observed in the decay. The result is based on total integrated luminosity corresponding to $2\cdot 10^7$ produced $\ddot{I}•$ mesons.

12 pages, 6 figures