Fock terms in the quark-meson coupling model

Abstract

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.

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

References in corpus (3)

• Sigma and omega meson propagation in a dense nuclear medium
• Critical analysis of quark-meson coupling models for nuclear matter and finite nuclei
• Quark-meson coupling model with constituent quarks: Exchange and pionic effects

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