Electromagnetic form factors in the J/ψmass region: The case in favor of additional resonances

Abstract

Using the results of our recent analysis of e^+e^- annihilation, we plot the curves for the diagonal and transition form factors of light hadrons in the time-like region up to the production threshold of an open charm quantum number. The comparison with existing data on the decays of J/ψinto such hadrons shows that some new resonance structures may be present in the mass range between 2 GeVand the J/ψmass. Searching them may help in a better understanding of the mass spectrum in both the simple and a more sophisticated quark models, and in revealing the details of the three-gluon mechanism of the OZI rule breaking in K\bar K channel.

Formulas are added, typo is corrected, the text is rearranged. Replaced to match the version accepted in Phys Rev D

References in corpus (1)

• Isoscalar resonances with J^{PC}=1^{--} in e^+e^-annihilation

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• Semi-classical Description of Exclusive Meson Pair Production in ${\gamma }^{\ast }\gamma$ Scattering
• Final-state interaction phase difference in $J/\psi \to \rho \eta$ and $\omega \eta$ decays