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Il Nuovo Cimento A (1965-1970)

, Volume 43, Issue 3, pp 752–756 | Cite as

A note on brokenSU3 symmetry

  • P. Ghose
  • S. Sen
Article
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Summary

On the assumption that the violation of unitary symmetry transforms like theI=0,Y=0 member of a unitary octet the coupling constants corresponding to the four observed decay modes \(\mathcal{N}*^ - \)→nπ, Y*→Λπ, Y*1→Σπ and Ξ*→Ξπ of theJ P =3/2+ baryon decuplet may be expressed in terms of three parameters. The ratio between two of the parameters has been estimated from the observed mass splittings by a simple ansatz. We predictΓ(Y*1→Λπ)=46 MeV andΓ(Y*1→Σπ)= =0.002 MeV in good agreement with experimental data.

Keywords

Decay Width Mass Splitting Reduce Matrix Element Baryon Octet Isotopic Spin 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Riassunto

Nell’ipotesi che la violazione della simmetria unitaria si trasformi come il membroI=0,Y=0 di un ottetto unitario, si possono esprimere in funzione di tre parametri le costanti d’accoppiamento corrispondenti ai quattro modi di decadimento \(\mathcal{N}*^ - \)→nπ, Y*→Λπ, Y*1→Σπ e Ξ*→Ξπ del decupletto barionicoJ P = 3/2+. Si è valutato con una semplice posizione il rapporto fra due dei parametri in base ai frazionamenti di masse osservati. Si prediceΓ(Y*1→Λπ)⋍46 MeV eΓ(Y*1→Σπ)⋍0.002 MeV in buon accordo con i dati sperimentali.

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Copyright information

© Società Italiana di Fisica 1966

Authors and Affiliations

  • P. Ghose
    • 1
  • S. Sen
    • 2
  1. 1.Indian Association for the Cultivation of ScienceJadavpur, CalcuttaIndia
  2. 2.Saha Institute of Nuclear PhysicsCalcuttaIndia

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