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

摘要

We develop a chiral SU(3) symmetric relativistic mean field 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-Λ hypernuclei are well explained. The nuclear matter equation of state (EOS) is found to be softened by σζ mixing which comes from determinant interaction. The neutron star matter EOS is further softened by Λ hyperons.