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On the effective σ-boson exchange in the relativistic Dirac-Brueckner approach to nuclear matter |
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| Authors: | R. Machleidt |
| Affiliation: | a Triumf 4004 Wesbrook Mall, Vancouver, B.C., Canada V6T 2A3 b Institut für Theoretische Kernphysik der Universität Bonn, Nussallee 14-16, D-5300, Bonn, West Germany Institute of Theoretical Physics, University of Regensburg, D-8400, Regensburg, West Germany |
| Abstract: | A relativistic form of the Brueckner theory of nuclear matter is applied to an extended meson-exchange model for the NN-interaction which contains explicit 2π-and π-exchange. This model avoids the effective σ-boson which is characteristic of the simplified meson exchange, as e.g. the one-boson-exchange (OBE) potential. It turns out that the relativistic saturation. effects found earlier within the OBE model are confirmed by the extended and more realistic model. In particular it is found that the relativistic effects caused by the explicit 2π-and π-exchange are well simulated by the effective σ-boson of the OBE model. |
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