Analysis of preliminary data on $e^{+}{e}^{-}\to \varphi \to \gamma f_0(980)\to \gamma {\pi }^0{\pi }^0$ reaction

Abstract

We perform the analysis of the preliminary data on $e^{+}{e}^{-}\to \varphi \to \gamma f_0(980)\to \gamma {\pi }^0{\pi }^0$ reaction simultaneously with the data on $\pi \pi$ scattering and reactions $J/\psi \to \varphi {\pi }^{+}{\pi }^{-}$ and $K^{-}p\to {\pi }^{+}{\pi }^{-}(\Lambda ,\Sigma )$. It is found that the $f_0(980)$ meson mass $m_{f_0}=950$ MeV and $B(\varphi \to \gamma f_0\to \gamma {\pi }^0{\pi }^0)\simeq 1\cdot 10^{-4}$.

Comments: 8 pages, revtex, 3 ps files of figures, minor changes