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We investigate the isospin splitting of neutron and proton effective masses in neutron-rich nuclear matter by using Brueckner-Hartree-Fock (BHF) approach and the extended BHF (EBHF) approach including the ground state correlation contributions. The realistic nucleon-nucleon interaction adopted in our calculation is the Argonne V18 two-body force supplemented with a microscopic three-body force constructed from the meson-exchange current approach. The result is reported in Fig. 1 where the neutron and proton effective masses are plotted as functions of isospin asymmetry parameterβ. It is shown that in both cases by adopting the BHF and EBHF approaches, the predicted neutron effective mass is greater than
We investigate the isospin splitting of neutron and proton effective masses in neutron-rich nuclear matter by using Brueckner-Hartree-Fock (BHF) approach and the extended BHF (EBHF) approach including the ground state correlation contributions. The realistic nucleon-nucleon interaction adopted in our calculation is the Argonne V18 two-body force supplemented with a microscopic three-body force constructed from the meson-exchange current approach. The result is reported in Fig. 1 where the neutron and proton effective masses are plotted as functions of isospin asymmetry parameterβ. It is shown that in both cases by adopting the BHF and EBHF approaches, the predicted neutron effective mass is greater than