Summary
We deduce the decay channels of J/ψ using the selection rule and the Lagrangian established on the symmetry groupL⊗0(4). The Lagrangian consists of partial Lagrangians corresponding to the decay types and formed on the requirement of minimal structure. The field operators of the spectral expansion are introduced into the Lagrangians. They are those of the particle groups having identical spins and isospins. The successive decays of J/ψ are supposed and discussed.
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Van Phi, D., Anh Duc, D. Decay of the J/ψ. Nuov Cim A 105, 1703–1727 (1992). https://doi.org/10.1007/BF02740921
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DOI: https://doi.org/10.1007/BF02740921