On the near-threshold enhancement in $J/ψ\to γX$ with $X\toωϕ$

Abstract

We investigate the possibility of producing the enhancement observed in $J/ψ\to γX$ with $X\to ωϕ$ at BES by intermediate meson rescatterings through $f_0(1710)\to PP\to ωϕ$, $f_0(1710)\to VV\to ωϕ$, and $f_0(1710)\to SS\to ωϕ$. We find that intermediate meson rescatterings can produce some enhancement near the $ωϕ$ threshold. Implications about the property of this enhancement are discussed.