Fock terms in the quark-meson coupling model
Date
1999
Authors
Krein, G.
Thomas, A.
Tsushima, K.
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Journal article
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Nuclear Physics A, 1999; 650(3):313-325
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G. Krein, A.W. Thomas, K. Tsushima
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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. © 1999 Elsevier Science B.V.
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Copyright © 1999 Published by Elsevier B.V.