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

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 inv...

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Bibliographic Details
Published in:arXiv.org 2023-06
Main 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
Format: Article
Language:English
Subjects:
Beryllium
Charge exchange
Pion beams
Pions
Online Access:Get full text
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Summary: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: \(Br(f_0(1710)\rightarrow \pi\pi)\cdot Br(f_0(1710)\rightarrow \omega\phi) = (4.8 \pm 1.2) \cdot 10^{-3}\).
ISSN:2331-8422