Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2004-07-21
Nucl.Phys. A744 (2004) 227-248
Physics
Nuclear Physics
Nuclear Theory
28 pages, 7 figures, to appear in Nucl. Phys. A, added additional references
Scientific paper
10.1016/j.nuclphysa.2004.08.019
The properties of asymmetric nuclear matter have been investigated in a relativistic Dirac-Brueckner-Hartree-Fock framework using the Bonn A potential. The components of the self-energies are extracted by projecting on Lorentz invariant amplitudes. Furthermore, the optimal representation scheme for the $T$ matrix, the subtracted $T$ matrix representation, is applied and the results are compared to those of other representation schemes. Of course, in the limit of symmetric nuclear matter our results agree with those found in literature. The binding energy $E_b$ fulfills the quadratic dependence on the asymmetry parameter and the symmetry energy is 34 MeV at saturation density. Furthermore, a neutron-proton effective mass splitting of $m_n^* < m_p^*$ is found. In addition, results are given for the mean-field effective coupling constants.
Faessler Amand
Fuchs Ch.
van Dalen} N. E. E.
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