Year: 2021
Type: article
Abstract: The Ξ-nuclear potential is investigated in the quark mean-field (QMF) model based on recent results on the Ξ − + 14 N ( C Ξ − 15 ) system. The experimental data on the binding energy of 1 p -state Ξ − hyperon in C Ξ − 15 hypernuclei in KISO, IBUKI, E07-T011, E176-14-03-35 events are merged as B Ξ − ( 1 p ) = 1.14 ± 0.11 MeV. With this constraint, the coupling strengths between the ω vector meson and Ξ hyperon are fixed in three QMF parameter sets. At the same time, the Ξ − binding energy of 1 s state in C Ξ − 15 is predicted as B Ξ − ( 1 s ) = 5.66 ± 0.38 MeV with the same interactions, completely consistent with the data from the KINKA and IRRAWADDY events. Finally, the Ξ-nuclear potential is calculated in the symmetric nuclear matter in the same framework. It is found to be U Ξ = −11.96 ± 0.85 MeV at nuclear saturation density, which is important for the discussions of the role of strangeness in a neutron star.
Authors: Jinniu Hu, Ying Zhang, Hong Shen
Institutions: Tianjin University, Nankai University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Award: G3097535441
OpenAlex ID: W4200305558