Constraints on the curvature of nuclear symmetry energy from recent astronomical data within the KIDS framework

In this paper, we investigate the density dependence of nuclear symmetry energy [Formula: see text] in KIDS (Korea-IBS-Daegu-SKKU) framework for equation state (EoS) and energy-density functional (EDF). The aim is to constrain value curvature parameter ([Formula: text]) based on recent astronomical data. First, assuming a standard saturation point, calculate bulk properties within KIDS-EDF different values compression modulus symmetric matter leading-order parameters, i.e., slope at density, each broadly accepted range, as well text]. All above EoS parameters are varied independently other. skewness presently kept fixed 650[Formula: text]MeV. For all sets which describe selected data better than text], neutron star mass–radius relation analyze results terms Pearson correlation coefficients We find that strongly correlated with radius both canonical massive If impose known constraints radii must be satisfied, deduce As result, function consistently found have an inflection point take opportunity report skin thickness text]Pb shows no contrast studies focus role only.