Publisher
Springer Science and Business Media LLC
Reference5 articles.
1. M. DerSarkissian andP. Nath:Nuovo Cimento,38, 1355 (1965).
2. J. R. Fulco, G. L. Shaw andD. Y. Wong:Phys. Rev.,137, B1242 (1965).
3. Natural units are being used;i. e. ℏ=1,c=1,m π=1.
4. I am indebted to Prof.J. Fulco for a private communication on this matter.
5. The quotientN/D is independent ofs a butN, D separately are not.