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Sun, TT; Xia, CJ; Zhang, SS; Smith, MS
Massive neutron stars and Lambda-hypernuclei in relativistic mean field models
发表期刊CHINESE PHYSICS C
语种英语
关键词MESON COUPLING MODEL P-SHELL HYPERNUCLEI EQUATION-OF-STATE BINDING-ENERGIES XI-HYPERNUCLEI GROUND-STATE NUCLEI MATTER MASSES SIGMA
摘要Based on relativistic mean field (RMF) models, we study finite Lambda-hypernuclei and massive neutron stars. The effective N-N interactions PK1 and TM1 are adopted, while the N-Lambda interactions are constrained by reproducing the binding energy of Lambda-hyperon at 18 orbit of Delta 40Ca. It is found that the Lambda-meson couplings follow a simple relation, indicating a fixed A potential well for symmetric nuclear matter at saturation densities, i.e., around V Lambda = -29.786 MeV. With those interactions, a large mass range of Lambda-hypernuclei can be described well. Furthermore, the masses of PSR J1614-2230 and PSR J0348+0432 can be attained adopting the Lambda-meson couplings g sigma(Lambda)/g sigma(N) greater than or similar to 0.73, g omega(Lambda)/g omega(N) greater than or similar to 0.80 for PK1 and g sigma(Lambda)/g sigma(N) greater than or similar to 0.81, g omega Lambda/g omega N greater than or similar to 0.90 TM1, respectively. This resolves the hyperon puzzle without introducing any additional degrees of freedom.
2018
ISSN1674-1137
卷号42期号:2页码:25101
学科领域Physics
学科门类Physics, Nuclear ; Physics, Particles & Fields
DOI10.1088/1674-1137/42/2/025101
收录类别SCIE
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/22964
专题理论物理所科研产出_SCI论文
作者单位1.Zhengzhou Univ, Sch Phys & Engn, Zhengzhou 450001, Henan, Peoples R China
2.Zhengzhou Univ, Henan Key Lab Ion Beam Bioengn, Zhengzhou 450001, Henan, Peoples R China
3.Zhejiang Univ, Ningbo Inst Technol, Sch Informat Sci & Engn, Ningbo 315100, Zhejiang, Peoples R China
4.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
5.Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China
6.[Smith, M. S.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA
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GB/T 7714
Sun, TT,Xia, CJ,Zhang, SS,et al. Massive neutron stars and Lambda-hypernuclei in relativistic mean field models[J]. CHINESE PHYSICS C,2018,42(2):25101.
APA Sun, TT,Xia, CJ,Zhang, SS,&Smith, MS.(2018).Massive neutron stars and Lambda-hypernuclei in relativistic mean field models.CHINESE PHYSICS C,42(2),25101.
MLA Sun, TT,et al."Massive neutron stars and Lambda-hypernuclei in relativistic mean field models".CHINESE PHYSICS C 42.2(2018):25101.
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