Kaon meson condensate in neutron star matter including hyperons

Abstract

The recent measurement of the mass of neutron stars (PSR J1614 - 2230, PSR J0348 + 0432, MSP J0740 + 6620) restricts the lower limit $\sim 2M_{\odot }$ of the maximum mass of such compact stars, making it possible for dense matter to exist in massive stars. The relativistic mean field theory with parameter sets FSUGold including Kaon condensation is used to describe the properties of neutron stars in $\beta$ equilibrium. Through careful choice of the parameter of the $\sigma$-cut $c_{\sigma }$, we are able to produce a maximum mass neutron star with Kaon condensation heavier than $2M_{\odot }$, and we find that the parameter ${\Lambda }_{\nu }$ of the $\rho -\omega$ interaction term in this model has a significant effect on $K^{-}$ condensation. In the case of using $\sigma$-cut scheme, $K^{-}$ condensation occurs only when the $\rho -\omega$ interaction ${\Lambda }_{\nu }$ is switched off.

arXiv comment9 pages, 9 figures

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• Modern nuclear and astrophysical constraints of dense matter in a renormalized chiral approach
• How the HESS J1731-347 event could be explained using ${\mathbf{K}}^{-}$ condensation
• Probing the impact of Delta-Baryons on Nuclear Matter and Non-Radial Oscillations in Neutron Stars
• Effect of Dark matter and $\sigma$-cut potential on radial and non-radial oscillation modes in neutron stars
• Effects of phase transition in hybrid stars from quark-meson coupling hadronic matter to deconfined quark matter
• Effects of Phi and ${\sigma }^{\ast }$-meson on properties of hyperon stars including $\Delta$ resonance
• Kaon-meson coupling from SU(3) flavour symmetry and application to antikaon condensed dense matter in neutron star
• Antikaon condensation in magnetized neutron star matter within the framework of the $\sigma$-cut scheme
• Maximum mass limit of strange stars in quadratic curvature-matter coupled gravity