Critical analysis of quark-meson coupling models for nuclear matter and finite nuclei

Details Critical analysis of quark-meson coupling models for nuclear matter and finite nuclei Critical analysis of quark-meson coupling models for nuclear matter and finite nuclei

1998-07-09

arxiv.org/abs/nucl-th/9807031v1

Nucl.Phys. A640 (1998) 55-76

Physics

Nuclear Physics

Nuclear Theory

29 pages with 11 figures

Scientific paper

10.1016/S0375-9474(98)00445-X

Three versions of the quark-meson coupling (QMC) model are applied to describe properties of nuclear matter and finite nuclei. The models differ in the treatment of the bag constant and in terms of nonlinear scalar self-interactions. As a consequence opposite predictions for the medium modifications of the internal nucleon structure arise. After calibrating the model parameters at equilibrium nuclear matter density, binding energies, charge radii, single-particle spectra and density distributions of spherical nuclei are analyzed and compared with QHD calculations. For the models which predict a decreasing size of the nucleon in the nuclear environment, unrealistic features of the nuclear shapes arise.

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