Lambda hypernuclei and neutron star matter in a chiral SU(3) relativistic mean field model with a logarithmic potential

TL;DR

This paper introduces a chiral SU(3) relativistic mean field model with a logarithmic potential that effectively describes hypernuclei and neutron star matter, aligning well with experimental data and revealing EOS softening effects.

Contribution

It presents a novel RMF model with a logarithmic potential for scalar condensates, improving the description of hypernuclei and neutron star matter within a chiral SU(3) framework.

Findings

Successfully explains nuclear matter saturation and hypernuclei properties.

Shows EOS softening due to sigma-zeta mixing and hyperon inclusion.

Aligns model predictions with empirical data.

Abstract

We develop a chiral SU(3) symmetric relativistic mean field (RMF) model with a logarithmic potential of scalar condensates. Experimental and empirical data of symmetric nuclear matter saturation properties, bulk properties of normal nuclei, and separation energies of single- and double-$\Lambda$ hypernuclei are well explained. The nuclear matter equation of state (EOS) is found to be softened by $\sigma\zeta$ mixing which comes from determinant interaction. The neutron star matter EOS is further softened by $\Lambda$ hyperons.