Nuclear Saturation with in-Medium Meson Exchange Interactions

Details Nuclear Saturation with in-Medium Meson Exchange Interactions Nuclear Saturation with in-Medium Meson Exchange Interactions

1997-06-02

arxiv.org/abs/nucl-th/9706006v1

Phys.Rev.Lett. 82 (1999) 1827-1830

Physics

Nuclear Physics

Nuclear Theory

5 pages REVTeX, 2 eps-figures included, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.82.1827

We show that the assumption of dropping meson masses together with conventional many-body effects, implemented in the relativistic Dirac-Brueckner formalism, explains nuclear saturation. We use a microscopic model for correlated $2\pi$ exchange and include the standard many-body effects on the in-medium pion propagation, which initially increase the attractive nucleon-nucleon ($NN$) potential with density. For the vector meson exchanges in both the $\pi\pi$ and $NN$ sector, we assume Brown-Rho scaling which---in concert with `chiral' $\pi\pi$ contact interactions---reduces the attraction at higher densities.

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