Revista: | Revista mexicana de física |
Base de datos: | PERIÓDICA |
Número de sistema: | 000425933 |
ISSN: | 0035-001X |
Autores: | Garcilazo, Humberto1 Valcarce, A2 Vijande, Javier3 |
Instituciones: | 1Instituto Politécnico Nacional, Ciudad de México. México 2Universidad de Salamanca, Salamanca. España 3Universidad de Valencia, Valencia. España |
Año: | 2017 |
Periodo: | Sep-Oct |
Volumen: | 63 |
Número: | 5 |
País: | México |
Idioma: | Inglés |
Tipo de documento: | Artículo |
Enfoque: | Analítico, teórico |
Resumen en inglés | 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 n p ( I ) J P = ( 1 / 2 ) 1 / 2 +, is bound by 144 keV; the recently discussed Λ n n ( I ) J P = ( 1 / 2 ) 1 / 2 + system is unbound, as well as the Λ Λ n n ( I ) J P = ( 1 ) 0 + system, being just above threshold. Our results indicate that the Ξ N N, Ξ Ξ N and Ξ Ξ N N systems with maximal isospin might be bound |
Disciplinas: | Física y astronomía |
Palabras clave: | Física, Interacciones de Baryon-Baryon, Ecuaciones de Faddeev, Acercamientos variables |
Keyword: | Physics, Baryon-Baryon interactions, Faddeev equations, Variational approaches |
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