Extreme Exotic Calcium Lambda Hypernuclei in the Relativistic Continuum Hartree—Bogoliubov Theory

Abstract. The covariant density functional theory with a few number of parameters has been widely used to describe the ground-state and excited-state properties for the nuclei all over the nuclear chart. In order to describe exotic properties of unstable nuclei, the contribution of the continuum and its coupling with bound states should be treated properly. In this Topical Review, the development of the covariant density functional theory in continuum will be introduced, including the relativistic continuum Hartree-Bogoliubov theory, the relativistic Hartree-Fock-Bogoliubov theory in continuum, and the deformed relativistic Hartree-Bogoliubov theory in continuum. Then the descriptions and predictions of the neutron halo phenomena in both spherical and deformed nuclei will be reviewed. The diffuseness of the nuclear potentials, nuclear shapes and density distributions, and the impact of the pairing correlations on nuclear size will be discussed.

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Prediction of exotic hyperon halos in neutron-rich Zr hypernuclei

Zhang

Sagawa

Hiyama

2022

Progress of Theoretical and Experimental Physics

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

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Extreme Exotic Calcium Lambda Hypernuclei in the Relativistic Continuum Hartree—Bogoliubov Theory

Cited by 6 publications

References 26 publications

Strength of pairing interaction for hyperons in multistrangeness hypernuclei

Strength of pairing interaction for hyperons in multistrangeness hypernuclei

Halos in medium-heavy and heavy nuclei with covariant density functional theory in continuum

Prediction of exotic hyperon halos in neutron-rich Zr hypernuclei

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