Relativistic mean-field approach for Λ,Ξ, and Σ hypernuclei

Z.-X. Liu (刘子鑫), C.-J. Xia (夏铖君), W.-L. Lu (吕万里), Y.-X. Li (李玉晓), J. N. Hu (胡金牛), and T.-T. Sun (孙亭亭)
Phys. Rev. C 98, 024316 – Published 22 August 2018

Abstract

We systematically study the properties of single-Λ,Ξ, and Σ hypernuclei within the framework of relativistic mean-field model. The YN coupling constants are constrained according to the experimental data and previous theoretical efforts. By adding a hyperon to Ca40, we investigate its mean-field potentials, single-hyperon levels, density distributions, and binding energies, where the consequences of introducing different types of hyperons (Λ,Ξ0,, and Σ+,0,) are examined. In general, the Λ and Σ0 hyperons show similar behaviors in bulk properties since both of them are electroneutral and have similar coupling constants; Ξ0 hyperon owns the shallowest mean-field potential well with the most extended density distribution; and Coulomb interactions play vital roles in the charged Ξ,Σ, and Σ+ hyperons. As a result, those hyperons have different impurity effects on the nuclear core Ca40. The ωYY tensor couplings are included and show remarkable effects on the spin-orbit splitting which even change the level ordering of Ξ hyperon. Finally, the single-hyperon binding energy of hypernuclei generally increases with the mass number. However, there is a turning point for Σ+ hypernuclei at NbΣ+91 where the binding energy begins to decrease. This is mainly due to the increasing Coulomb repulsive potential at large proton numbers.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
1 More
  • Received 26 May 2018

DOI:https://doi.org/10.1103/PhysRevC.98.024316

©2018 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Z.-X. Liu (刘子鑫)1, C.-J. Xia (夏铖君)2, W.-L. Lu (吕万里)1, Y.-X. Li (李玉晓)1, J. N. Hu (胡金牛)3,*, and T.-T. Sun (孙亭亭)1,†

  • 1School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, China
  • 2School of Information Science and Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China
  • 3School of Physics, Nankai University, Tianjin 300071, China

  • *hujinniu@nankai.edu.cn
  • ttsunphy@zzu.edu.cn

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 98, Iss. 2 — August 2018

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×