Prediction of exotic hyperon halos in neutron-rich Zr hypernuclei. (12th January 2022)

• Record Type: Journal Article
• Authors: Zhang, Ying; Sagawa, Hiroyuki; Hiyama, Emiko
• Is Part Of: Progress of theoretical and experimental physics. Volume 2022:Number 2(2022)
• Publication Date: 2022-01-12
• Subjects: D10 -- D14; Physics -- Periodicals; Mathematical physics -- Periodicals; 530.05
• DOI: 10.1093/ptep/ptac004
• Languages: English
• ISSNs: 2050-3911

Abstract

Abstract: We study the single- and double-Λ hypernuclei in Zr isotopes with the Hartree–Fock–Bogoliubov model and Skyrme-type nucleon–nucleon, Λ–nucleon, and Λ–Λ interactions. We found two peculiar features of the Λ hyperon halo phenomena that have never been found in nuclei without the strangeness degree of freedom. One is the d -wave halo, and the other is a bunch of three halo orbits just below the Λ hyperon threshold in $^{137}_\Lambda$ Zr and also in $^{138}_{\Lambda \Lambda }$ Zr. We name these exotic halo phenomena giant hyperon halos in hypernuclei whose core nucleus 136 Zr was predicted to have a "giant neutron halo." The interaction between Λ hyperons and the neutrons is responsible for inducing giant hyperon halo phenomena in the single- and double-Λ nuclei $^{137}_\Lambda$ Zr and $^{138}_{\Lambda \Lambda }$ Zr.