Effects of neutron excess in deformed λ hypernuclei

Suo Qiu; Huai Tong Xue; Xian Rong Zhou

doi:10.1007/s41365-025-01793-2

Effects of neutron excess in deformed λ hypernuclei

Suo Qiu
, Huai Tong Xue^*
, Xian Rong Zhou^*

^*Corresponding author for this work

School of Physics and Electronic Science

Research output: Contribution to journal › Article › peer-review

Abstract

The neutron excess effect, originating from the vanishing of one part of τ1·τ2 operator matrix elements, was appropriately considered within the Skyrme-type ΛNN three-body interactions and applied to the deformed SHF model. Analysis of a broad range of hypernuclei, from light to heavy masses, shows that the neutron excess effect significantly improves the description of Λ binding energies. The underlying mechanism involves reducing the ΛNN three-body repulsive interaction by subtracting the neutron excess term, thereby improving the binding energy of the hypernucleus. In addition, the impact of this effect on the Λ single-particle potential and the hyperon density distribution is discussed.

Original language	English
Article number	239
Journal	Nuclear Science and Techniques
Volume	36
Issue number	12
DOIs	https://doi.org/10.1007/s41365-025-01793-2
State	Published - Dec 2025

Keywords

Binding energy
Isospin factor
Neutron excess
Skyrme-type ΛN interaction
Λ hypernuclei

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10.1007/s41365-025-01793-2

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title = "Effects of neutron excess in deformed λ hypernuclei",

abstract = "The neutron excess effect, originating from the vanishing of one part of τ1·τ2 operator matrix elements, was appropriately considered within the Skyrme-type ΛNN three-body interactions and applied to the deformed SHF model. Analysis of a broad range of hypernuclei, from light to heavy masses, shows that the neutron excess effect significantly improves the description of Λ binding energies. The underlying mechanism involves reducing the ΛNN three-body repulsive interaction by subtracting the neutron excess term, thereby improving the binding energy of the hypernucleus. In addition, the impact of this effect on the Λ single-particle potential and the hyperon density distribution is discussed.",

keywords = "Binding energy, Isospin factor, Neutron excess, Skyrme-type ΛN interaction, Λ hypernuclei",

author = "Suo Qiu and Xue, \{Huai Tong\} and Zhou, \{Xian Rong\}",

note = "Publisher Copyright: {\textcopyright} The Author(s), under exclusive licence to China Science Publishing \& Media Ltd. (Science Press), Shanghai Institute of Applied Physics, the Chinese Academy of Sciences, Chinese Nuclear Society 2025.",

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doi = "10.1007/s41365-025-01793-2",

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TY - JOUR

T1 - Effects of neutron excess in deformed λ hypernuclei

AU - Qiu, Suo

AU - Xue, Huai Tong

AU - Zhou, Xian Rong

N1 - Publisher Copyright: © The Author(s), under exclusive licence to China Science Publishing & Media Ltd. (Science Press), Shanghai Institute of Applied Physics, the Chinese Academy of Sciences, Chinese Nuclear Society 2025.

PY - 2025/12

Y1 - 2025/12

N2 - The neutron excess effect, originating from the vanishing of one part of τ1·τ2 operator matrix elements, was appropriately considered within the Skyrme-type ΛNN three-body interactions and applied to the deformed SHF model. Analysis of a broad range of hypernuclei, from light to heavy masses, shows that the neutron excess effect significantly improves the description of Λ binding energies. The underlying mechanism involves reducing the ΛNN three-body repulsive interaction by subtracting the neutron excess term, thereby improving the binding energy of the hypernucleus. In addition, the impact of this effect on the Λ single-particle potential and the hyperon density distribution is discussed.

AB - The neutron excess effect, originating from the vanishing of one part of τ1·τ2 operator matrix elements, was appropriately considered within the Skyrme-type ΛNN three-body interactions and applied to the deformed SHF model. Analysis of a broad range of hypernuclei, from light to heavy masses, shows that the neutron excess effect significantly improves the description of Λ binding energies. The underlying mechanism involves reducing the ΛNN three-body repulsive interaction by subtracting the neutron excess term, thereby improving the binding energy of the hypernucleus. In addition, the impact of this effect on the Λ single-particle potential and the hyperon density distribution is discussed.

KW - Binding energy

KW - Isospin factor

KW - Neutron excess

KW - Skyrme-type ΛN interaction

KW - Λ hypernuclei

UR - https://www.scopus.com/pages/publications/105018580536

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DO - 10.1007/s41365-025-01793-2

M3 - 文章

AN - SCOPUS:105018580536

SN - 1001-8042

VL - 36

JO - Nuclear Science and Techniques

JF - Nuclear Science and Techniques

IS - 12

M1 - 239

ER -

Effects of neutron excess in deformed λ hypernuclei

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