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arXiv · 2306.07779

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

V. A. Dorofeev·D. R. Eremeev·V. G. Gotman·A. V. Ivashin·I. A. Kachaev·Yu. A. Khokhlov·M. S. Kholodenko·V. F. Konstantinov·V. I. Lisin·V. D. Matveev·E. V. Nazarov·V. I. Nikolaenko·A. N. Plekhanov·D. I. Ryabchikov·A. A. Shumakov·V. P. Sugonyaev·A. M. Zaitsev
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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: $Br(f_0(1710)\rightarrow \pi\pi)\cdot Br(f_0(1710)\rightarrow \omega\phi) = (4.8 \pm 1.2) \cdot 10^{-3}$.

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V. A. Dorofeev, D. R. Eremeev, V. G. Gotman, A. V. Ivashin, I. A. Kachaev, Yu. A. Khokhlov, M. S. Kholodenko, V. F. Konstantinov, V. I. Lisin, V. D. Matveev, E. V. Nazarov, V. I. Nikolaenko, A. N. Plekhanov, D. I. Ryabchikov, A. A. Shumakov, V. P. Sugonyaev, A. M. Zaitsev. 2023-06-13. An observation of the $f_0(1710)$ meson in the $\omega\phi$ system in the Pion-$Be$ Interaction at Momentum of 29 GeV. https://arxiv.org/abs/2306.07779

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