ABSTRACT
Given now the particles, hyperons, and mesons, and knowing that they are strongly coupled, the next problem is to find which are strongly coupled to which and in what manner. These couplings must satisfy conservation of nucleon number, charge, isotopic spin, and strangeness, but that is far from determining them completely. For example, what coupling does the π have besides the nucleon coupling (8-1), (8-2)? Is there a coupling Λ → Σ, π and of what strength and kind, etc.? Again what is the law of coupling of the K’s in (9-4) and in reactions such as N ↔ Σ, K or Σ ↔ Ξ, K? Even the spins of the particles are uncertain. Studies of the decay K+ π+ + π+ + π+ + π− indicate strongly that no angular momentum is carried out by the pions, so the kaon spin is probably 0. But the experimental evidence is incomplete on Λ, Σ, and Ξ, although spin 1/2 is indicated for the Λ and Σ. Probably the hyperons all have spin 1/2, the mesons spin 0.
