dorsal/arxiv
View SchemaNuclear Three-body Force Effect on a Kaon Condensate in Neutron Star Matter
| Authors | W. Zuo, A. Li, Z. H. Li, U. Lombardo |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0412102 |
| URL | https://arxiv.org/abs/nucl-th/0412102 |
| DOI | 10.1103/PhysRevC.70.055802 |
| Journal | Phys.Rev.C70:055802,2004 |
Abstract
We explore the effects of a microscopic nuclear three-body force on the threshold baryon density for kaon condensation in chemical equilibrium neutron star matter and on the composition of the kaon condensed phase in the framework of the Brueckner-Hartree-Fock approach. Our results show that the nuclear three-body force affects strongly the high-density behavior of nuclear symmetry energy and consequently reduces considerably the critical density for kaon condensation provided that the proton strangeness content is not very large. The dependence of the threshold density on the symmetry energy becomes weaker as the proton strangeness content increases. The kaon condensed phase of neutron star matter turns out to be proton-rich instead of neutron-rich. The three-body force has an important influence on the composition of the kaon condensed phase. Inclusion of the three-body force contribution in the nuclear symmetry energy results in a significant reduction of the proton and kaon fractions in the kaon condensed phase which is more proton-rich in the case of no three-body force. Our results are compared to other theoretical predictions by adopting different models for the nuclear symmetry energy. The possible implications of our results for the neutron star structure are also briefly discussed.
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"abstract": "We explore the effects of a microscopic nuclear three-body force on the\nthreshold baryon density for kaon condensation in chemical equilibrium neutron\nstar matter and on the composition of the kaon condensed phase in the framework\nof the Brueckner-Hartree-Fock approach. Our results show that the nuclear\nthree-body force affects strongly the high-density behavior of nuclear symmetry\nenergy and consequently reduces considerably the critical density for kaon\ncondensation provided that the proton strangeness content is not very large.\nThe dependence of the threshold density on the symmetry energy becomes weaker\nas the proton strangeness content increases. The kaon condensed phase of\nneutron star matter turns out to be proton-rich instead of neutron-rich. The\nthree-body force has an important influence on the composition of the kaon\ncondensed phase. Inclusion of the three-body force contribution in the nuclear\nsymmetry energy results in a significant reduction of the proton and kaon\nfractions in the kaon condensed phase which is more proton-rich in the case of\nno three-body force. Our results are compared to other theoretical predictions\nby adopting different models for the nuclear symmetry energy. The possible\nimplications of our results for the neutron star structure are also briefly\ndiscussed.",
"arxiv_id": "nucl-th/0412102",
"authors": [
"W. Zuo",
"A. Li",
"Z. H. Li",
"U. Lombardo"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.70.055802",
"journal_ref": "Phys.Rev.C70:055802,2004",
"title": "Nuclear Three-body Force Effect on a Kaon Condensate in Neutron Star Matter",
"url": "https://arxiv.org/abs/nucl-th/0412102"
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