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Nuclear matter
About: Nuclear matter is a research topic. Over the lifetime, 10180 publications have been published within this topic receiving 248261 citations.
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TL;DR: In this paper, the authors derived the isospin splitting of the nucleon mean field from the Brueckner theory extended to asymmetric nuclear matter, and compared the theoretical predictions with the empirical parametrizations of neutron and proton optical model potentials based on the experimental nucleon-nucleus scattering and the phenomenological ones adopted in transport model simulations of heavy-ion collisions.
Abstract: The isospin splitting of the nucleon mean field is derived from the Brueckner theory extended to asymmetric nuclear matter. The Argonne ${V}_{18}$ has been adopted as bare interaction in combination with a microscopic three-body force. The isospin splitting of the effective mass is determined from the Brueckner-Hartree-Fock self-energy: It is linear according to the Lane ansatz, such that ${m}_{n}^{*}g{m}_{p}^{*}$ for neutron-rich matter. The symmetry potential is also determined, and a comparison is made with the predictions of the Dirac-Brueckner approach and the phenomenological interactions. The theoretical predictions are also compared with the empirical parametrizations of neutron and proton optical model potentials based on the experimental nucleon-nucleus scattering and the phenomenological ones adopted in transport model simulations of heavy-ion collisions. The direct contribution of the rearrangement term due to three-body forces to the single-particle potential and symmetry potential is discussed.
98 citations
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TL;DR: A relativistic hadronic model, which incorporates nonlinear chiral symmetry and broken scale invariance, is presented and applied at the one-baryon-loop level to finite nuclei and good fits to the bulk properties of finiteuclei and single-particle spectra are obtained.
Abstract: A relativistic hadronic model for nuclear matter and finite nuclei, which incorporates nonlinear chiral symmetry and broken scale invariance, is presented and applied at the one-baryon-loop level to finite nuclei. The model contains an effective light scalar field that is responsible for the midrange nucleon-nucleon attraction and which has anomalous scaling behavior. One-loop vacuum contributions in this background scalar field at finite density are constrained by low-energy theorems that reflect the broken scale invariance of quantum chromodynamics. A mean-field energy functional for nuclear matter and nuclei is derived that contains small powers of the fields and their derivatives, and the validity of this truncation is discussed. Good fits to the bulk properties of finite nuclei and single-particle spectra are obtained.
98 citations
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TL;DR: In this paper, zero and finite temperature contributions of ground state correlations to the nuclear mean field are studied in nuclear matter at normal density, where the framework is the nonrelativistic hole line expansion with the Paris potential as the bare NN interaction.
98 citations
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TL;DR: In this paper, the in-medium properties of K − mesons in nuclear matter were discussed, including the effect of K ± sub-threshold production in heavy-ion collisions.
98 citations
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TL;DR: In this article, the Δ-isobar degrees of freedom are included in the covariant density functional (CDF) theory to study the equation of state (EoS) and composition of dense matter in compact stars.
98 citations