Correlations between critical parameters and bulk properties of nuclear matter

TL;DR

This paper investigates correlations between critical parameters and bulk properties of nuclear matter using relativistic mean-field models, providing predictions consistent with experimental data and proposing an improved model parametrization.

Contribution

It identifies key correlations between critical parameters and bulk quantities in RMF models, enhancing predictive capability and aligning theoretical results with experimental data.

Findings

Correlations between $T_c$, $P_c$, $ ho_c$ and bulk properties like $M^*$ and $K_o$ are established.

Predictions for critical parameters are consistent with recent experimental data.

An improved RMF parametrization is proposed for better agreement with experimental critical values.

Abstract

The present work starts by providing a clear identification of correlations between critical parameters ($T_c$, $P_c$, $\rho_c$) and bulk quantities at zero temperature of relativistic mean-field models (RMF) presenting third and fourth order self-interactions in the scalar field $\sigma$. Motivated by the nonrelativistic version of this RMF model, we show that effective nucleon mass ($M^*$) and incompressibility ($K_o$), at the saturation density, are correlated with $T_c$, $P_c$, and $\rho_c$, as well as, binding energy and saturation density itself. We verify agreement of results with previous theoretical ones regarding different hadronic models. Concerning recent experimental data of the symmetric nuclear matter critical parameters, our study allows a prediction of $T_c$, $P_c$ and $\rho_c$ compatible with such values, by combining them, through the correlations found, with previous constraints related to $M^*$ and $K_o$. An improved RMF parametrization, that better agrees with experimental values for $T_c$, is also indicated.