Studying the parameters of the extended $\sigma$-$\omega$ model for neutron star matter

In this work we study the parameters of the extended $\sigma$-$\omega$ model for neutron star matter by a Bayesian analysis on state-of-the-art multi-messenger astronomy observations, namely mass, radius and tidal deformabilities. We have considered three parameters of the model, the Landau mass $m_L$, the nuclear compressibility $K_0$, and the value of the symmetry energy $S_0$, all at saturation density $n_0$. As a result, we are able to estimate the best values of the Landau mass of $m_L \approx 0.73$ GeV, whereas the values of $K_0$ and $S_0$ fall within already known empirical values. Furthermore, for neutron stars we find the most probable value of 13 km $

Keywords:

• Omega
• Sigma
• Compressibility
• Nuclear physics
• Saturation (chemistry)
• Approx
• Astrophysics
• Neutron star
• Physics
• nuclear theory

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