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Finite Nuclei in the Quark-Meson Coupling Model

Abstract : We report the first use of the effective quark-meson coupling (QMC) energy density functional (EDF), derived from a quark model of hadron structure, to study a broad range of ground state properties of even-even nuclei across the periodic table in the nonrelativistic Hartree-Fock þ BCS framework. The novelty of the QMC model is that the nuclear medium effects are treated through modification of the internal structure of the nucleon. The density dependence is microscopically derived and the spin-orbit term arises naturally. The QMC EDF depends on a single set of four adjustable parameters having a clear physics basis. When applied to diverse ground state data the QMC EDF already produces, in its present simple form, overall agreement with experiment of a quality comparable to a representative Skyrme EDF. There exist, however, multiple Skyrme parameter sets, frequently tailored to describe selected nuclear phenomena. The QMC EDF set of fewer parameters, derived in this work, is not open to such variation, chosen set being applied, without adjustment, to both the properties of finite nuclei and nuclear matter.
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J R Stone, P Am Guichon, P G Reinhard, A.W. Thomas. Finite Nuclei in the Quark-Meson Coupling Model. Physical Review Letters, American Physical Society, 2016, 116 (09), pp.092501. ⟨10.1103/PhysRevLett.116.092501⟩. ⟨cea-01505531⟩



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