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Il Nuovo Cimento (1955-1965)

, Volume 24, Issue 3, pp 497–507 | Cite as

The unitary simmetry and a connection between the ¦δs¦≠1/2 and ¦δi¦ = 2 rules

  • B. d’Espagnat
  • J. Prentki
Article

Smumary

The assumption is made that the weak interactions are invariant under a three-dimensional rotation subgroup «G » ofSU3, which of course is not the isospin subgroup. It is then shown that for non-leptonic and leptonic decays, the rule ¦ΔI¦ = 1/2 follows from the requirement ¦ΔS¦≠ 2 and vice-versa. In such a theory these selection rules are equivalent.

Riassunto

Si fa l’ipotesi che le interazioni deboli siano invarianti per un sottogruppo tridimensionale di rotazione «G » diSU2, che non è, naturalmente, il sottogruppo dell’isospin. Si dimostra poi che per decadimenti leptonici e non leptonici, la legge ¦ΔI¦=1/2 dériva dalla condizione ¦ΔS¦ ≠ 2 e viceversa. In tale teoria queste leggi di selezione sono equivalenti.

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References

  1. (1).
    M. Ikeda, S. Ogawa andY. Ohnuki:Prog. Theor. Phys.,22, 715 (1959);Y. Yamaguchi:Prog. Theor. Phys. Suppl., No.11, (1959);J. Wess:Nuovo Cimento,10, 15 (1960);M. Gell-Mann:The eightfold way, preprint.MathSciNetADSCrossRefGoogle Scholar
  2. (2).
    M. Gell-Mann:Symmetries of baryons and mesons, submitted toPhys. Rev.;Y. Neeman:Nucl. Phys.,26, 222 (1961);A. Salam andJ. Ward:Nuovo Cimento,20, 419 (1961).Google Scholar
  3. (3).
    S. L. Glashow andM. Gell-Mann:Gauge theory of vector particles, report CTSL 28 (1961).Google Scholar
  4. (4).
    L. A. Radicati andD. Speiser: to be published.Google Scholar
  5. (5).
    B. D’Espagnat, J. Prentki andA. Salam:Nucl. Phys.,5, 441 (1958).Google Scholar
  6. (6).
    M. Gell-Mann:La Jolla Conference on Strong and Weak Interactions (June 1961).Google Scholar
  7. (7).
    R. E. Behrends, J. Dreitlein, C. Fronsdal andB. W. Lee:Simple groups and strong interaction symmetries, to be published.Google Scholar

Copyright information

© Società Italiana di Fisica 1962

Authors and Affiliations

  • B. d’Espagnat
    • 1
  • J. Prentki
    • 1
  1. 1.CERNGeneva

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