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An observation of the $f_0(1710)$ meson in the $\omega\phi$ system in the Pion-$Be$ Interaction at Momentum of 29 GeV

Authors :
Dorofeev, V. A.
Eremeev, D. R.
Gotman, V. G.
Ivashin, A. V.
Kachaev, I. A.
Khokhlov, Yu. A.
Kholodenko, M. S.
Konstantinov, V. F.
Lisin, V. I.
Matveev, V. D.
Nazarov, E. V.
Nikolaenko, V. I.
Plekhanov, A. N.
Ryabchikov, D. I.
Shumakov, A. A.
Sugonyaev, V. P.
Zaitsev, A. M.
Publication Year :
2023

Abstract

The charge-exchange reaction $\pi^-p \rightarrow n\,\omega(783)\phi(1020)$, $\omega \rightarrow \pi^+\pi^-\pi^0$, $\phi \rightarrow K^+K^-$ 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 $M_{\omega\phi}$ 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 $\pi^-p \rightarrow n\, f_0(1710)$ the product of branching fractions is found to be: $Br(f_0(1710)\rightarrow \pi\pi)\cdot Br(f_0(1710)\rightarrow \omega\phi) = (4.8 \pm 1.2) \cdot 10^{-3}$.

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.2306.07779
Document Type :
Working Paper