We explore the influence of symmetry energy and the $\sigma$-cut potential on the properties of pure nucleonic and hyperon-rich neutron stars employing the relativistic mean-field (RMF) model with the S271 parameter set. The effects of symmetry energy are modulated by the ${\mathrm{\Lambda }}_v$ coupling, while the $\sigma$-cut potential is governed by the free parameter $f_s$. The coupling constants between hyperons and mesons are ascertained based on the most recent hyperon-nucleon potentials derived from existing experimental data. Our analysis suggests that ${\mathrm{\Lambda }}_v$ has more effect compared to $f_s$ on the composition and global properties of neutron stars. Our results are consistent with various observational data, particularly with the GW170817 data.

• Received 6 November 2023
• Accepted 22 January 2024

DOI:https://doi.org/10.1103/PhysRevC.109.025805