1. E. Elbaz andJ. Meyer:Lett. Nuovo Cimento,28, 241 (1980).
2. E. Elbaz andJ. Meyer:Lett. Nuovo Cimento,28, 247 (1980).
3. E. Elbaz andJ. Meyer:Nuovo Cimento, A,57, 271 (1980).
4. E. Elbaz, J. Meyer andR. Nahabetian: Report LYCEN 8028 (April 1980).
5. Particle Data Group:Review of particles properties, Phys. Lett. B,75, 1 (1978); all the others unreferenced masses and branching ratios are taken from this paper.