Chronology of Milestone Events in Particle Physics - GELL-MANN 1956
Chronology of Milestone Events in Particle Physics


Gell-Mann, M.;
The Interpretation of the New Particles as Displaced Charge Multiplets
Nuovo Cim. Suppl. 4 (1956) 848;

The purpose of this communication is to present a coherent summary of the author's theoretical proposals1 concerning the new unstable particles.
Section 2 is devoted to some background material on elementary particles; the object there is to introduce the point of view adopted in the work that follows. In Section 3 the fundamental ideas about displaced multiplets are given, and in the succeeding section these are applied to the interpretation of known particles. A scheme is thus set up, which is used in Section 5 to predict certain results of experiments involving the new particles.
scriptsize 1 Much of the work to be presented is contained in the following publications:
M. Gell-Mann, Phys. Rev. 92 (1953) 833; M. Gell-Mann and A. Pais, Proceedings of the Glasgow Conference, 1954, and in an unpublished note: M. Gell-Mann: On the Classification of Particles (circulated in preprint form, August, 1953). In these references, however, the proposals under discussion are mentioned only briefly and are sometimes buried in a mass of other material. Here they are treated alone and in some detail. Practically the same proposals have been put forward in Japan. See T. Nakano and K. Nishijima: Prog. Theor. Phys. 10 (1953) 581 and K. Nishijima (to be published). .

Related references
See also
R. P. Feynman and G. Speisman, Phys. Rev. 94 (1954) 500;
Y. Nambu, K. Nishijima, and Y. Yamaguchi, Progr. of Theor. Phys. 6 (1951) 651;
S. Oneda, Progr. of Theor. Phys. 6 (1951) 633;
A. Pais and O. Piccioni, Phys. Rev. 100 (1955) 1487;
G. C. Wick, Accad. Lincei, Atti. 21 (1935) 170;
M. Gell-Mann and A. Pais, Phys. Rev. 97 (1955) 1387;
W. B. Fowler et al., Phys. Rev. 98 (1955) 121;
A. Pais, Phys. Rev. 86 (1952) 663;

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Gell-Mann classification of strange particles with prediction of o and o.
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