Stable bound states of N's, Lambda's and Xi's

Author(s)

Garcilazo, H. ; Valcarce, A. ; Vijande, J.

• Document type: Journal article
• Source: REVISTA MEXICANA DE FISICA; v. 63, n. 5, p. 411-422, SEP-OCT 2017.
• Web of Science Citations: 0

Abstract

We review our recent work about the stability of strange few-body systems containing N's, Lambda's, and Xi'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 ESCO8c 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, Lambda np(I)J(P) = (1/2)1/2(+), is bound by 144 keV; the recently discussed Lambda nn (I)J(P) = (1/2)1/2(+) system is unbound, as well as the Lambda Lambda nn (I)J(P) = (1)0(+) system, being just above threshold. Our results indicate that the Xi NN, Xi Xi N and Xi Xi NN systems with maximal isospin might be bound. (AU)

• FAPESP's process: 15/50326-5 - Charmed hadron physics
• Grantee: Gastão Inácio Krein
• Support type: Regular Research Grants