Interpreting the peak structures around 1800 MeV in the BES data on $J/Ψ\to ϕπ^+ π^-$, $J/Ψ\to γωϕ$

Abstract

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

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