Relativistic Mean-field Approach for &and;, &Xi; and &sum; Hypernuclei

LIU Zixin; XIA Chengjun; SUN Tingting

doi:10.11804/NuclPhysRev.35.04.523

Single ∧, Ξ, and ∑ hypernuclei are systematically studied within the framework of relativistic mean-field (RMF) model with YN interactions being constrained according to the experimental data and previous theoretical efforts. By adding a hyperon to ¹⁶O, the mean-field potentials and single-particle levels for hyperons (∧, Ξ^0,-, and ∑^+,0,-) are compared and the impurity effects on the nuclear core are examined. In general, the ∧ and ∑⁰ hyperons show similar behaviors in bulk properties since both of them are electroneutral and with similar coupling constants; Ξ⁰ hyperon owns the shallowest mean-field potential well; and Coulomb interactions play vital roles in the charged Ξ^-, ∑^-, and ∑⁺ hyperons. As an impurity, the intruded single-hyperon makes the nuclear system more bound in most cases due to the attractive NY interaction. However, very different effects on the nucleon radii are observed for different hyperons. Besides, the effects of the ωYY tensor couplings on the spin-orbit splitting are discussed, and remarkable influences are found which even change the level ordering of Ξ hyperon.

Relativistic Mean-field Approach for ∧, Ξ and ∑ Hypernuclei

1. School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, China;

2. School of Information Science and Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, Zhejiang, China

Funds: National Natural Science Foundation of China (11505157, 11705163); Physics Research and Development Program of Zhengzhou University (32410017)

Received Date: 2018-09-23

Rev Recd Date: 2018-11-03

Publish Date: 2020-05-03

Key words:

Abstract: Single ∧, Ξ, and ∑ hypernuclei are systematically studied within the framework of relativistic mean-field (RMF) model with YN interactions being constrained according to the experimental data and previous theoretical efforts. By adding a hyperon to ¹⁶O, the mean-field potentials and single-particle levels for hyperons (∧, Ξ^0,-, and ∑^+,0,-) are compared and the impurity effects on the nuclear core are examined. In general, the ∧ and ∑⁰ hyperons show similar behaviors in bulk properties since both of them are electroneutral and with similar coupling constants; Ξ⁰ hyperon owns the shallowest mean-field potential well; and Coulomb interactions play vital roles in the charged Ξ^-, ∑^-, and ∑⁺ hyperons. As an impurity, the intruded single-hyperon makes the nuclear system more bound in most cases due to the attractive NY interaction. However, very different effects on the nucleon radii are observed for different hyperons. Besides, the effects of the ωYY tensor couplings on the spin-orbit splitting are discussed, and remarkable influences are found which even change the level ordering of Ξ hyperon.

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Relativistic Mean-field Approach for ∧, Ξ and ∑ Hypernuclei

doi: 10.11804/NuclPhysRev.35.04.523

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通讯作者: 陈斌, bchen63@163.com

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Relativistic Mean-field Approach for ∧, Ξ and ∑ Hypernuclei

doi: 10.11804/NuclPhysRev.35.04.523

1. School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, China;

2. School of Information Science and Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, Zhejiang, China

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Relativistic Mean-field Approach for ∧, Ξ and ∑ Hypernuclei

doi: 10.11804/NuclPhysRev.35.04.523

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Proportional views

Relativistic Mean-field Approach for ∧, Ξ and ∑ Hypernuclei

doi: 10.11804/NuclPhysRev.35.04.523

1. School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, China; 2. School of Information Science and Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, Zhejiang, China

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1. School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, China;

2. School of Information Science and Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, Zhejiang, China