1. To make this statement, we argue as follows. Experimentally (3) $$\bar pp \to \to \left( {K_1 K_1 + K_2 K_2 } \right)/K_1 K_2 \approx 1/70$$ . Annihilation into K1K1+K2K2 can occur only from a state of odd angular momentum while K0 0K0 0 final states appear only from even angular momentum states. At rest, therefore, $$\bar pp$$ is mostly in anS state. Further, neglecting the relative momentum of the nucleons, the $$\bar pp$$ system then interacts like an elementary particle withJ P =1− or 0−. The assumption that the relative momentum is negligible is equivalent to assuming that the initial $$\bar pp$$ configuration is determined solely by the electromagnetic interaction. We thank Prof.R. H. Hildebrand for a discussion of this point.
2. M. Gell-Mann, D. Sharp andW. Wagner:Phys. Rev. Lett.,8, 261 (1962);W. Wargner:Ph. D. Thesis, California Institute of Technology (unpublished). When this model is applied to the decays ΰ0→γ+γ and ω→3π the results disagree with experiment by a factor of six. This is worse than the previously determined factor of 4, obtained using the older (smaller) experimental value of the ω0 width, as discussed byR. Dashen andD. Sharp:Phys. Rev.,133, B 1585 (1964). It is hard to see how this difference could be accounted for other than by denying γ0ρ, dominance in the ΰ0 decay.
3. C. Baltay, N. Barash, P. Franzini, N. Gel’fand, L. Kirsch, G. Lütjens D. Miller, J. C. Severiens, J. Steinberger, T. H. Tan, D. Tycko, D. Zanello, R. Goldberg andR. J. Plano:Phys. Rev. Lett.,15, 532 (1965). One of us (M.P.) wishes to thankN. Barash for a discussion of the $$K^* \bar K^* $$ final states.
4. S. K. Kundu andM. Yonezawa:Nucl. Phys.,44, 499 (1963);A. C. Hearn andE. Leader:International Conference of Nucleon Structure, Stanford University (1963).
5. A. H. Rosenfeld, A. Barbaro-Galtieri, W. H. Barkas, P. L. Bastien, J. Kirz andM. Roos:Rev. Mod. Phys.,36, 977 (1964).