$\delta$ meson effects on neutron stars in the modified quark-meson coupling model

Abstract

The properties of neutron stars are investigated by including $\delta$ meson field in the Lagrangian density of modified quark-meson coupling model. The ${\Sigma }^{-}$ population with $\delta$ meson is larger than that without $\delta$ meson at the beginning, but it becomes smaller than that without $\delta$ meson as the appearance of ${\Xi }^{-}$. The $\delta$ meson has opposite effects on hadronic matter with or without hyperons: it softens the EOSes of hadronic matter with hyperons, while it stiffens the EOSes of pure nucleonic matter. Furthermore, the leptons and the hyperons have the similar influence on $\delta$ meson effects. The $\delta$ meson increases the maximum masses of neutron stars. The influence of $({\sigma }^{\ast },\varphi )$ on the $\delta$ meson effects are also investigated.

10 pages, 6 figures, 4 tables

References in corpus (5)

• Constraints on the high-density nuclear equation of state from the phenomenology of compact stars and heavy-ion collisions
• Neutron star properties in density-dependent relativistic Hartree-Fock theory
• Neutron star matter in the quark-meson coupling model in strong magnetic fields
• Low density instabilities in asymmetric nuclear matter within QMC with $\delta$-meson
• Application of density dependent parametrization models to asymmetric nuclear matter

Cited by in corpus (6)

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• Nuclear effective charge factor originating from covariant density functional theory
• Modification of the Nuclear Landscape in the Inverse Problem Framework using the Generalized Bethe-Weizsäcker Mass Formula
• Relativistic Neutron Stars: Rheological Type Extensions of the Equations of State