Fock terms in the quark-meson coupling model

Details Fock terms in the quark-meson coupling model Fock terms in the quark-meson coupling model

1998-10-07

arxiv.org/abs/nucl-th/9810023v2

Nucl.Phys.A650:313-325,1999

Physics

Nuclear Physics

Nuclear Theory

RevTex, 17 pages, 4 Postscript figures, version to appear in Nucl. Phys. A

Scientific paper

10.1016/S0375-9474(99)00117-7

The mean field description of nuclear matter in the quark-meson coupling model is improved by the inclusion of exchange contributions (Fock terms). The inclusion of Fock terms allows us to explore the momentum dependence of meson-nucleon vertices and the role of pionic degrees of freedom in matter. It is found that the Fock terms maintain the previous predictions of the model for the in-medium properties of the nucleon and for the nuclear incompressibility. The Fock terms significantly increase the absolute values of the single-particle, four-component scalar and vector potentials, a feature that is relevant for the spin-orbit splitting in finite nuclei.

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