में बचाया:
| मुख्य लेखकों: | , , |
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| स्वरूप: | Preprint |
| प्रकाशित: |
2016
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| विषय: | |
| ऑनलाइन पहुंच: | https://arxiv.org/abs/1611.01768 |
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| _version_ | 1866916946402869248 |
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| author | Goudarzi, S. Moshfegh, H. R. Haensel, P. |
| author_facet | Goudarzi, S. Moshfegh, H. R. Haensel, P. |
| contents | Density dependence of nuclear symmetry energy as well as its partial wave decomposition is studied within the framework of lowest-order constrained variational (LOCV) method using AV18 two-body interaction supplemented by UIX three-body force. The main focus of the present work is to introduce a revised version of three-body force which is based on an isospin-dependent parametrization of coefficients in the UIX force, in order to overcome the inability to produce correct saturation-point parameters} in the framework of LOCV method. We find that employing the new model of {\ph three-body force} in the LOCV formalism leads to successfully reproducing the semi-empirical parameters of cold nuclear matter, including} $E_{sym}(ρ_0)$, $L$, and $K_{sym}$. All our models of three-body force combined with AV18 two-body force give maximum neutron star mass higher than $2\;M_\odot$. The fraction of protons in the nucleon cores of neutron stars strongly depends on the three-body force parametrization. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_1611_01768 |
| institution | arXiv |
| publishDate | 2016 |
| record_format | arxiv |
| spellingShingle | Nuclear symmetry energy and the role of three-body forces Goudarzi, S. Moshfegh, H. R. Haensel, P. Nuclear Theory Density dependence of nuclear symmetry energy as well as its partial wave decomposition is studied within the framework of lowest-order constrained variational (LOCV) method using AV18 two-body interaction supplemented by UIX three-body force. The main focus of the present work is to introduce a revised version of three-body force which is based on an isospin-dependent parametrization of coefficients in the UIX force, in order to overcome the inability to produce correct saturation-point parameters} in the framework of LOCV method. We find that employing the new model of {\ph three-body force} in the LOCV formalism leads to successfully reproducing the semi-empirical parameters of cold nuclear matter, including} $E_{sym}(ρ_0)$, $L$, and $K_{sym}$. All our models of three-body force combined with AV18 two-body force give maximum neutron star mass higher than $2\;M_\odot$. The fraction of protons in the nucleon cores of neutron stars strongly depends on the three-body force parametrization. |
| title | Nuclear symmetry energy and the role of three-body forces |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/1611.01768 |