dorsal/arxiv
View SchemaNeutron stars with isovector scalar correlations
| Authors | B. Liu, H. Guo, M. Di Toro, V. Greco |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0409014 |
| URL | https://arxiv.org/abs/nucl-th/0409014 |
| DOI | 10.1140/epja/i2005-10095-1 |
| Journal | Eur.Phys.J. A25 (2005) 293-298 |
Abstract
Neutron stars with the isovector scalar $\delta$-field are studied in the framework of the relativistic mean field ($RMF$) approach in a pure nucleon plus lepton scheme. The $\delta$-field leads to a larger repulsion in dense neutron-rich matter and to a definite splitting of proton and neutron effective masses. Both features are influencing the stability conditions of the neutron stars. Two parametrizations for the effective nonlinear Lagrangian density are used to calculate the nuclear equation of state ($EOS$) and the neutron star properties, and compared to correlated Dirac-Brueckner results. We conclude that in order to reproduce reasonable nuclear structure and neutron star properties within a $RMF$ approach a density dependence of the coupling constants is required.
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"abstract": "Neutron stars with the isovector scalar $\\delta$-field are studied in the\nframework of the relativistic mean field ($RMF$) approach in a pure nucleon\nplus lepton scheme. The $\\delta$-field leads to a larger repulsion in dense\nneutron-rich matter and to a definite splitting of proton and neutron effective\nmasses. Both features are influencing the stability conditions of the neutron\nstars. Two parametrizations for the effective nonlinear Lagrangian density are\nused to calculate the nuclear equation of state ($EOS$) and the neutron star\nproperties, and compared to correlated Dirac-Brueckner results. We conclude\nthat in order to reproduce reasonable nuclear structure and neutron star\nproperties within a $RMF$ approach a density dependence of the coupling\nconstants is required.",
"arxiv_id": "nucl-th/0409014",
"authors": [
"B. Liu",
"H. Guo",
"M. Di Toro",
"V. Greco"
],
"categories": [
"nucl-th"
],
"doi": "10.1140/epja/i2005-10095-1",
"journal_ref": "Eur.Phys.J. A25 (2005) 293-298",
"title": "Neutron stars with isovector scalar correlations",
"url": "https://arxiv.org/abs/nucl-th/0409014"
},
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