Interpreting the peak structures around 1800 MeV in the BES data on $J/\Psi \to \varphi {\pi }^{+}{\pi }^{-}$, $J/\Psi \to \gamma \omega \varphi$

Abstract

In this talk we present an interpretation for the experimental data available on two different processes, namely, $J/\Psi \to \varphi {\pi }^{+}{\pi }^{-}$, $J/\Psi \to \gamma \omega \varphi$, which seem to indicate existence of two new resonances with the same quantum numbers ($J^{\pi c}=0^{++},I=0$) and very similar mass (~1800 MeV) but with very different decay properties. However, our studies show that the peak structure found in the $\omega \varphi$ invariant mass, in $J/\Psi \to \gamma \omega \varphi$, is a manifestation of the well known $f_0(1710)$ while the cross section enhancement found in $J/\Psi \to \varphi {\pi }^{+}{\pi }^{-}$ is indeed a new $f_0$ resonance with mass near 1800 MeV. We present an explanation for the different decay properties of these two scalar resonances.

Comments: Proceedings for the nuclear physics meeting ("XXXVI Reunião de trabalho sobre física nuclear no Brasil") held in Maresias during Sept. 1-5. To be published as AIP proceedings