1. P. Söding, J. Bartels, A. Barbaro-Galtieri, J. Enstrom, T. Lasinski, A. Rittenberg, A. Rosenfeld, T. Trippe, N. Barash-Schmidt, C. Bricman, V. Chaloupka andM. Roos:Phys. Lett.,39 B, 1 (1972).
2. The ω → πππ decay is summarized in ref. (1) The ω → ππ decay is observed as a ρ-ω interference dip (G. Goldhaber, W. Butler, D. Coyne, B. Hall, J. Mac Naughton andG. Trilling:Phys. Rev. Lett.,23, 1351 (1969)), and also as an interference peak (S. Hagopian, V. Hagopian, E. Bogart andW. Selove:Phys. Rev. Lett.,25, 1050 (1970);B. Ratcliff, F. Bulos, R. Carnegie, E. Kluge, D. Leith, H. Lynch, B. Richter, H. Williams andS. Williams:Phys. Lett.,38 B, 345 (1972)), with roughly the same width as the ω → πππ decay.
3. B. T. Feld:Models of Elementary Particles, Chap. 4 (Waltham, Mass., 1969).
4. M. H. Mac Gregor:Lett. Nuovo Cimento,4, 1309 (1970), Table VI.
5. See ref. (3), p. 158. Without calculations, this is just a conjecture.