Asymmetric nuclear matter in a Hartree-Fock approach to non-linear QHD

Details Asymmetric nuclear matter in a Hartree-Fock approach to non-linear QHD Asymmetric nuclear matter in a Hartree-Fock approach to non-linear QHD

2000-11-09

arxiv.org/abs/nucl-th/0011033v2

Phys.Rev. C64 (2001) 045203

Physics

Nuclear Physics

Nuclear Theory

12 pages (LATEX), 3 Postscript figures, revised version

Scientific paper

10.1103/PhysRevC.64.045203

The Equation of State (EOS) for asymmetric nuclear matter is discussed starting from a phenomenological hadronic field theory of Serot-Walecka type including exchange terms. In a model with self interactions of the scalar sigma-meson we show that the Fock terms naturally lead to isospin effects in the nuclear EOS. These effects are quite large and dominate over the contribution due to isovector mesons. We obtain a potential symmetry term of "stiff" type, i.e. increasing with baryon density and an interesting behaviour of neutron/proton effective masses of relevance for transport properties of asymmetric dense matter.

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