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Il Nuovo Cimento A (1965-1970)

, Volume 45, Issue 4, pp 493–510 | Cite as

CP violation and the deviations from the ΔI=1/2 rule in the nonleptonic hyperon decays

  • A. Baltas
  • K. Gavroglu
  • D. Photinos
Article
  • 22 Downloads

Summary

In this paper we investigate the problem of CP violation in the nonleptonic decays of hyperons. Three parameters are proposed which express the extent of CP violation in these decays. The problem of CP violation in the nonleptonic hyperon decays is not only different from that in the K decays, but it is seen to be related very closely with the deviations from the exact ΔI=1/2 rule. Furthermore, model-dependent calculations give also similar results and some additional relations.

СР нарущение и отклонения от правила ΔI=1/2 в нелептонных распадах гиперонов

Реэюме

В зтой статье мы исследуем проблему СР нарущения в нелептонных распадах гиперонов. Предлагаются три параметра, которые выражают СР нарущение в зтих распадах. Проблема СР нарущения в нелентонных распадах гиперонов не только отличается от нарущения в К-распадах, но, по-видимому, тесно свяэана с отклонениями от точного правила ΔI=1/2. Кроме того, вычисления, эависяшие от модели, также дают аналогичные реэультаты и приводят к некоторым дополнительным соотнощениям.

Riassunto

In quest’articolo si analizza il problema della violazione di CP nei decadimenti non leptonici degli iperoni. Si propongono tre parametri che esprimono l’entità di violazione di CP in questi decadimenti. Il problema della violazione di CP nei decadimenti iperonici non leptonici è non solo differente da quello dei decadimenti dei kaoni, ma si è visto che è collegato strettamente con le deviazioni dell’esatta regola ΔI=1/2. Inoltre, calcoli dipendenti dal modello danno anche risultati simili ed alcune ulteriori relazioni.

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References

  1. (1).
    For an extensive review of the hyperon nonleptonic decays seeR. Marshak, Riazuddin andC. P. Ryan:Theory of Weak Interactions in Particle Physics (New York, N. Y., 1968). See alsoK. Gavroglu andM. D. Scadron:Nuovo Cimento,14 A, 812 (1973);P. K. Kabir:The CPPuzzle: Strange Decays of the Neutral Kaons (New York, N. Y., 1968).Google Scholar
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    Ref. (1), talk byL. Wolfeinstein:Workshop on Weak Interactions, September 1975, Ohio, USA.Google Scholar
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  5. (*).
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    For a discussion of the final-state interactions in the nonleptonic decays of hyperons seeO. E. Overseth andS. Pakvasa:Phys. Rev.,184, 1663 (1969);T. Reid andM. Trofimenkoff:Nucl. Phys.,40 B, 255 (1972).CrossRefADSGoogle Scholar
  10. (9).
    These relations have been first proposed byF. Hussein andG. Rottelli:Nuovo Cimento,50 A, 152 (1967).CrossRefADSGoogle Scholar
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Copyright information

© Società Italiana di Fisica 1978

Authors and Affiliations

  • A. Baltas
    • 1
  • K. Gavroglu
    • 1
  • D. Photinos
    • 2
  1. 1.Physics Laboratory INational Technical UniversityAthensGreece
  2. 2.Department of Theoretical PhysicsUniversity of PatrasPatrasGreece

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