Density dependent parametrization models: Formalism and applications

Avancini, S. S.; Menezes, D. P.

doi:10.1103/physrevc.74.015201

Cited by 31 publications

(56 citation statements)

References 65 publications

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“…We note that there are some recent works [115,116,117,118,119] in which the standard RMF models are extended to include density-dependent hadron masses and meson coupling constants via the Brown-Rho (BR) scaling [120]. In particular, the parameter sets SLC and SLCd constructed in Ref.…”

Section: Discussionmentioning

confidence: 99%

Isospin-dependent properties of asymmetric nuclear matter in relativistic mean field models

2007

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Using various relativistic mean-field models, including the nonlinear ones with meson field selfinteractions, those with density-dependent meson-nucleon couplings, and the point-coupling models without meson fields, we have studied the isospin-dependent bulk and single-particle properties of asymmetric nuclear matter. In particular, we have determined the density dependence of nuclear symmetry energy from these different relativistic mean-field models and compare the results with the constraints recently extracted from analyses of experimental data on isospin diffusion and isotopic scaling in intermediate-energy heavy ion collisions as well as from measured isotopic dependence of the giant monopole resonances in even-A Sn isotopes. Among the 23 parameter sets in the relativistic mean-filed model that are commonly used for nuclear structure studies, only a few are found to give symmetry energies that are consistent with the empirical constraints. We have also studied the nuclear symmetry potential and the isospin-splitting of the nucleon effective mass in isospin asymmetric nuclear matter. We find that both the momentum dependence of the nuclear symmetry potential at fixed baryon density and the isospin-splitting of the nucleon effective mass in neutron-rich nuclear matter depend not only on the nuclear interactions but also on the definition of the nucleon optical potential.

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Section: Discussionmentioning

confidence: 99%

Isospin-dependent properties of asymmetric nuclear matter in relativistic mean field models

2007

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“…If one wants to follow the analytical calculations in detail, please refer to Refs. [1,26], among many other papers in the literature. 064902-2 The Lagrangian density that incorporates many parametrizations of the NLWM [1,[7][8][9] and also the extra nonlinear σ -ρ and ω-ρ couplings [13] reads…”

Section: Formalismmentioning

confidence: 99%

Constraining relativistic models through heavy ion collisions

Menezes¹,

Providência²,

Chiapparini³

et al. 2007

Phys. Rev. C

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Relativistic models can be successfully applied to the description of compact star properties in nuclear astrophysics as well as to nuclear matter and finite nuclei properties, these studies taking place at low and moderate temperatures. Nevertheless, all results are model dependent and so far it is unclear whether some of them should be discarded. Moreover, in the regime of hot hadronic matter very few calculations exist using these relativistic models, in particular when applied to particle yields in heavy ion collisions. In the present work we comment on the known constraints that can help the selection of adequate models in this regime and investigate the main differences that arise when the particle production during a Au+Au collision at RHIC is calculated with different models.Comment: 9 pages, 1 figure, 3 table

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“…In several very recent studies [176][177][178][179][180], the standard RMF model was extended by considering the in-medium hadron properties governed by the Brown-Rho (BR) scaling of hadron in-medium properties [181] to mimic the chiral symmetry restoration at high densities. In these studies, both hadron masses and the meson coupling constants are density-dependent.…”

Section: The Phenomenological Approachmentioning

confidence: 99%

“…[176][177][178][179][180] to include densitydependent hadron masses and meson coupling constants via the Brown-Rho (BR) scaling [181] to mimic the effects of chiral symmetry restoration at high densities. As illustrated in Fig.…”

Section: Effects Of Charge Symmetry Breaking On the Symmetry Energy Imentioning

confidence: 99%

Recent progress and new challenges in isospin physics with heavy-ion reactions

2008

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The ultimate goal of studying isospin physics via heavy-ion reactions with neutron-rich, stable and/or radioactive nuclei is to explore the isospin dependence of in-medium nuclear effective interactions and the equation of state of neutron-rich nuclear matter, particularly the isospin-dependent term in the equation of state, i.e., the density dependence of the symmetry energy. Because of its great importance for understanding many phenomena in both nuclear physics and astrophysics, the study of the density dependence of the nuclear symmetry energy has been the main focus of the intermediate-energy heavy-ion physics community during the last decade, and significant progress has been achieved both experimentally and theoretically. In particular, a number of phenomena or observables have been identified as sensitive probes to the density dependence of the nuclear symmetry energy. Experimental studies have confirmed some of these interesting isospin-dependent effects and allowed us to constrain relatively stringently the symmetry energy at sub-saturation densities. The impacts of this constrained density dependence of the symmetry energy on the properties of neutron stars have also been studied, and they were found to be very useful for the astrophysical community. With new opportunities provided by the various radioactive beam facilities being constructed around the world, the study of isospin physics is expected to remain one of the forefront research areas in nuclear physics. In this report, we review the major progress achieved during the last decade in isospin physics with heavy ion reactions and discuss future challenges to the most important issues in this field.Key words: Equation of state of asymmetric nuclear matter, Nuclear symmetry energy, Heavy-ion reactions with neutron-rich nuclei, Neutron skin thickness of heavy nuclei, Neutron stars Constraining the Skyrme effective interactions and the neutron skin thickness of heavy nuclei using terrestrial nuclear laboratory data 216 8

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Density dependent parametrization models: Formalism and applications

Cited by 31 publications

References 65 publications

Isospin-dependent properties of asymmetric nuclear matter in relativistic mean field models

Isospin-dependent properties of asymmetric nuclear matter in relativistic mean field models

Constraining relativistic models through heavy ion collisions

Recent progress and new challenges in isospin physics with heavy-ion reactions

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