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- W205120915 abstract "The impact of a delta meson field (the scalar-isovector channel) on asymmetric nuclear matter is studied within relativistic mean-field (RMF) models with both constant and density dependent (DD) nucleon-meson couplings. The Equation of State (EOS) for asymmetric nuclear matter and the neutron star properties by the different models are compared. We find that the delta-field in the constant coupling scheme leads to a larger repulsion in dense neutron-rich matter and to a definite splitting of proton and neutron effective masses, finally influencing the stability of the neutron stars. A broader analysis of possible delta-field effects is achieved considering also density dependent nucleon-meson coupling. A remarkable effect on the relation between mass and radius for the neutron stars is seen, showing a significant reduction of the radius along with a moderate mass reduction due to the increase of the effective delta coupling in high density regions." @default.
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- W205120915 date "2008-01-01" @default.
- W205120915 modified "2023-09-27" @default.
- W205120915 title "delta MESON EFFECTS ON ASYMMETRIC NUCLEAR MATTER" @default.
- W205120915 hasPublicationYear "2008" @default.
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