Kavli Affiliate: Yu V. Nazarov
| First 5 Authors: V. A. Dorofeev, V. A. Dorofeev, , ,

| Summary:
The charge-exchange reaction $π^-p rightarrow n,ω(783)φ(1020)$, $ωrightarrow π^+π^-π^0$, $φrightarrow K^+K^-$ is studied with the upgraded VES facility (U-70, Protvino) in the interaction of a 29 GeV pion beam with a beryllium target. The distribution over the invariant mass of the system $M_ωφ$ shows a near-threshold signal. A partial wave analysis reveals that the scalar state ($J^PC=0^++$) dominates in this mass region.
The observed signal can be described with a contribution of the known resonance $f_0(1710)$. Using OPE approximation for the reaction $π^-p rightarrow n, f_0(1710)$ the product of branching fractions is found to be: $Br(f_0(1710)rightarrow ππ)cdot Br(f_0(1710)rightarrow ωφ) = (4.8 pm 1.2) cdot 10^-3$.
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