1. O. Chamberlain, E. Segre, C. Wiegand andT. Ypsilantis:Phys. Rev.,100, 947 (1955).
2. For evidence on multiple pion production at the energies considered seeL. Eisberg et al.:Phys. Rev.,97, 797 (1955);G. Maenchen et al.: Phys. Rev.,99, 1619 (1955).
3. Cf. ref. (2).
4. L. M. Brown andM. Peshkin:Northwest University Preprint; see alsoL. M. Brown, I. Harris andM. Pershkin:Bull. Amer. Phys. Soc.,1, no. 1, 52 (1956).
5. Assuming the anti-proton has zero « strangeness », and using the scheme ofM. Gell-Mann (Pisa Conference Report, Suppl. Nuovo Cimento, 1956) it follows that an even number of K-mesons must be produced. A stopped anti-proton can produce, only two K-mesons.