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VOLUME 22 (1975) | ISSUE 6 | PAGE 331
Production of Ψ particles in reactions of the charge-exchange type
It is shown that the cross section for the production of particles in reactions of the charge-exchange type is strongly suppressed, as follows from the experimental data, in comparison with the cross section for the production of particles consisting of ρ and η quarks. This offers evidence in favor of the structure Ψ = (cc).