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| Natura: | Artículo científico |
| Lingua: | en |
| Pubblicazione: |
Sociedad Mexicana de Física A.C.
2017
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| Accesso online: | https://www.redalyc.org/articulo.oa?id=57051630003 |
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Sommario:
- Stable bound states of N’s, Λ’s and Ξ’s H. Garcilazo A. Valcarce J. Vijande Física, Astronomía y Matemáticas Baryon Faddeev equations Baryon interactions variational approaches We review our recent work about the stability of strange few-body systems containing N ’s, Λ ’s, and Ξ ’s. We make use of local central Yukawa-type Malfliet-Tjon interactions reproducing the low-energy parameters and phase shifts of the nucleon-nucleon system and the latest updates of the hyperon-nucleon and hyperon-hyperon ESC08c Nijmegen potentials. We solve the three- and four-body bound-state problems by means of Faddeev equations and a generalized Gaussian variational method, respectively. The hypertriton, Λ np ( I ) J P = (1 / 2)1 / 2 + , is bound by 144 keV; the recently discussed Λ nn ( I ) J P = (1 / 2)1 / 2 + system is unbound, as well as the ΛΛ nn ( I ) J P = (1)0 + system, being just above threshold. Our results indicate that the Ξ NN , ΞΞ N and ΞΞ NN systems with maximal isospin might be bound. 2017 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57051630003 en http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.5 Vol.63