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Il Nuovo Cimento A (1965-1970)

, Volume 102, Issue 1, pp 203–216 | Cite as

Hyperon-nucleon scattering

  • J. J. de Swart
  • T. A. Rijken
  • P. M. Maessen
  • R. G. E. Timmermans
Article

Summary

The Nijmegen soft-core potential model is discussed in the context of modern views in strong interactions. TheNN version of this model is compared with some other, the so-called realisticNN potentials. A nice feature of this potential model is that it can easily be extended to the YN channels usingSU(3). It will be shown that the YN version of this model gives a high-quality fit to the existing experimental YN data. Not only the scattering data are described very well, but also the capture ratio at rest is very good, and theF/(F+D) ratioαPS for the PV-coupling of the pseudoscalar mesons used in this model, could be kept in perfect agreement with the value from the weak interactions. Finally the reaction\(\bar p\)p→\(\bar \Lambda \)Λ will be discussed.

PACS

21.80 - Hypernuclei 

PACS

13.75.Ev - Hyperon-nucleon interactions (energy⩽10 GeV) 

PACS

13.75.Cs - Nucleon-nucleon interactions, includings antinucleon, deuteron, etc. (energy⩽10 GeV) 

Гиперон-нуклонное рассеяние

Реэюме

Обсуждается модель потенциала Неймегена в контексте современного подхода к теории сильных вэаимодействий.NN-вариант зтой модели сравнивается с некоторыми другими, так наэываемыми реалистическимиNN-потенциалами. Наиболее важная характеристика зтой модели потенциала может быть легко обобшена на YN-каналы, испоьэуяSU(3). Покаэывается, что YN-вариант зтой модели качественно согласуется с сушествуюшими зкспериментальными YN-данными. Хорощо описываются не только данные по рассеянию, а также отнощение эахвата в покое является очень хорощим иF/(R +D) отнощение αps для PV-свяэи псевдоскалярных меэонов, испольэованных в зтой модели, хорощо согласуется с величиной, полученной иэ слабых вэаимодействий. В эаключение, обсуждается реакция\(\bar p\)p→\(\bar \Lambda \)Λ.

Riassunto

Si discute il modello di potenziale di Nijmegen del soft core nell’ambito delle prospettive moderne nelle interazioni forti. La versioneNN di questo modello si confronta con altri cosiddetti potenziali realistici YNN. Una caratteristica piacevole di questo modello di potenziale è che questo si può estendere facilmente ai canali YN usandoSU(3). Si mostra che la versione di YN di questo modello fornisce un’approssimazione di alta qualità dei dati sperimentali disponibili YN. Non solo si descrivono i dati di scattering molto bene, ma anche il rapporto di cattura in quiete è molto buono, e il rapportoF/(F+D)αPS per l’accoppiamento PV dei mesoni pseudoscalari usato in questo modello si può prendere in perfetto accordo con il valore ottenuto dalle interazioni deboli. Infine si discute la reazione\(\bar p\)p→\(\bar \Lambda \)Λ.

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Copyright information

© Società Italiana di Fisica 1989

Authors and Affiliations

  • J. J. de Swart
    • 1
  • T. A. Rijken
    • 1
  • P. M. Maessen
    • 1
  • R. G. E. Timmermans
    • 1
  1. 1.Institute for Theoretical PhysicsUniversity of NijmegenNijmegenThe Netherlands

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