Equation of state for neutron-rich matter with self-consistent Green function approach

The properties of asymmetric nuclear matter have been investigated in the framework of the selfconsistent Green function approach at zero temperature. Results of the total energy per nucleon as a function of the density and asymmetry parameter are presented for two modern realistic nucleon–nucleon interactions: Nijmegen II and CD-Bonn. For comparison purposes, the same calculations are performed for Brueckner–Hartree–Fock approximation. Also we have compared our results with the predictions of other theoretical models especially the Dirac–Brueckner–Hartree–Fock approach. The self-consistent Green’s function approach leads to a stiffer equation of state as compared to the Brueckner–Hartree–Fock approximation. This effect increases with density.