Quark-meson coupling model for antikaon condensation in neutron star matter with strong magnetic fields

Abstract

We study the effects of strong magnetic fields on antikaon condensation in neutron star matter using the quark-meson coupling (QMC) model. The QMC model describes a nuclear many-body system as nonoverlapping MIT bags in which quarks interact through the self-consistent exchange of scalar and vector mesons in the mean-field approximation. It is found that the presence of strong magnetic fields alters the threshold density of antikaon condensation significantly. The onset of $K^{-}$ condensation stronger depends on the magnetic field strength, and it even shifts beyond the threshold of ${\bar{K}}^0$ condensation for sufficiently strong magnetic fields. In the presence of strong magnetic fields, the equation of state (EOS) becomes stiffer in comparison with the field-free case. The softening of the EOS by antikaon condensation also depends on the magnetic field strength, and it becomes less pronounced with increasing magnetic field strength. The results of the QMC model are compared with those obtained in a relativistic mean-field (RMF) model, and we find there are quantitative differences between the results of the QMC and RMF models.

23 pages, 6 figures

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Cited by in corpus (13)

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• Superfluidity of $\Lambda$ hyperons in neutron stars
• Warm and dense stellar matter under strong magnetic fields
• Dense stellar matter with trapped neutrinos under strong magnetic fields
• Properties of hyperonic matter in strong magnetic fields
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• In medium properties of $K^0$ and $\varphi$ mesons under an external magnetic field
• Magnetic field dependence of nucleon parameters from QCD sum rules
• (Anti)kaon condensation in strongly magnetized dense matter
• Neutron stars with Bogoliubov quark-meson coupling model
• Medium modifications of baryon properties in nuclear matter and hypernuclei
• Impact of crust-core connection procedures on the tidal deformability of neutron stars
• Antikaon condensation in magnetized neutron star matter within the framework of the $\sigma$-cut scheme