We derive SU(4) mass formulas taking mixing, whenever it arises, fully into account. With the masses of the usual hadrons and that of the newly discovered resonance ψ as input, we predict the masses of the new 1^- and 0^- mesons as well as the ⁺ and 3/2⁺ baryons.
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Окубо et al. (1975) studied this question.
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