Symmetry potentials and in-medium nucleon-nucleon cross sections within the Nambu–Jona-Lasinio model in relativistic impulse approximation

Wei, Si-Na; Yang, Rong-Yao; Ye, Jing; Niu, Li; Jiang, Wei-Zhou

doi:10.1103/physrevc.103.064604

Cited by 4 publications

(9 citation statements)

References 77 publications

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“…The difference between the lower and upper panels of Figure 5 in the depicted density region is attributed to the energy dependence of the NN scattering amplitudes. In particular, the RIA results with E kin = 800 MeV actually include some contributions of the inelastic nucleon-nucleon scattering [45]. Note that the symmetry potential obtained with the models SCL and FSUGold is similar and also close at high densities, as shown in Figure 5.…”

Section: Modelsmentioning

confidence: 55%

“…The models to be used are the extended NJL model (NJL350) with a momentum cutoff 350 MeV [20,45,49], SLCd that is a density-dependent relativistic model with chiral limit [24,54], the extended linear-σ model in the strong coupling limit (denoted by SCL) [16], and the RMF model FSUGold [51]. The RMF model FSUGold can reproduce the properties of finite nuclei well [51], while it produces the maximum mass of neutron stars below the 2M constraint.…”

Section: Resultsmentioning

confidence: 99%

“…The extended NJL model includes the additional interaction terms with the scalar-vector, scalar-isovector couplings (G SV , G ρS ) to fit the saturation and density dependence of the symmetry energy. Here, the additional terms are given by [20,45,49]…”

Section: Models With Chiral Symmetrymentioning

confidence: 99%

“…It is known that the optical potentials obtained from the RIA can reproduce the analyzing power and spin-rotation parameter in proton-nucleus (pA) scatterings successfully [35][36][37], in stark contrast with the standard nonrelativistic optical models [38,39]. In the past, the RIA has also been used to study the symmetry potentials [40][41][42][43] and inmedium nucleon-nucleon (NN) cross sections [44,45]. In this work, we study the effects of the chiral symmetry on the symmetry potential in the RIA.…”

Section: Introductionmentioning

confidence: 99%

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Nuclear Potentials Relevant to the Symmetry Energy in Chiral Models

Wei

Jiang

2022

Symmetry

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We employ the extended Nambu-Jona-Lasinio (NJL), linear-σ models, and the density-dependent model with chiral limits to work out the mean fields and relevant properties of nuclear matter. To have the constraint from the data, we re-examine the Dirac optical potentials and symmetry potential based on the relativistic impulse approximation (RIA). Unlike the extended NJL and the density-dependent models with the chiral limit in terms of the vanishing scalar density, the extended linear-σ model with a sluggish changing scalar field loses the chiral limit at the high-density end. The various scalar fields can characterize the different Schrödinger-equivalent potentials and kinetic symmetry energy in the whole density region and the symmetry potential in the intermediate density region. The drop in the scalar field due to the chiral restoration results in a clear rise of the kinetic symmetry energy. The chiral limit in the models gives rise to the softening of the symmetry potential and thereof the symmetry energy at high densities.

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Section: Modelsmentioning

confidence: 55%

Section: Resultsmentioning

confidence: 99%

Section: Models With Chiral Symmetrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nuclear Potentials Relevant to the Symmetry Energy in Chiral Models

Wei

Jiang

2022

Symmetry

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show abstract

“…It is known that the optical potentials obtained from the RIA can reproduce the analyzing power and spin-rotation parameter in proton-nuclei scatterings successfully [33][34][35], in stark contrast with the standard nonrelativistic optical models [36,37]. In the past, the RIA has also been used to study the symmetry potentials [38][39][40][41] and in-medium nucleon-nucleon (NN) cross sections [42,43]. With the help of the RIA, we study in this work the effects of the chiral symmetry on the symmetry potential.…”

Section: Introductionmentioning

confidence: 99%

Nuclear potentials relevant to the symmetry energy in chiral models

Niu¹,

Wei²,

Jiang³

2021

Preprint

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We employ the extended Nambu-Jona-Lasinio, linear-σ models, and the density-dependent model with chiral limits to work out the mean fields and relevant properties of nuclear matter. To have the constraint from the data, we reexamine the Dirac optical potentials and symmetry potential based on the relativistic impulse approximation (RIA). Unlike the extended NJL and the density-dependent models with the chiral limit in terms of the vanishing scalar density, the extended linear-σ model with a sluggish changing scalar field loses the chiral limit at the high density end. The various scalar fields can characterize the different Schrödinger-equivalent potentials and kinetic symmetry energy in the whole density region and the symmetry potential in the intermediate density region. The drop of the scalar field due to the chiral restoration results in a clear rise of the kinetic symmetry energy. The chiral limit in the models gives rise to the softening of the symmetry potential and thereof the symmetry energy at high densities.

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Elastic scattering based on energy-dependent relativistic Love-Franey model at energies between 20 and 800 MeV*

Wei

Feng

2023

Chinese Phys. C

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In order to investigate the elastic scattering, we fit scattering observables of the weighted fits (WF16) with relativistic Love-Franey (RLF) model. The masses, cutoff parameters and initial coupling strengths of RLF are assumed to be independent of energy. Since the energy boundary between low energy and high energy is around 200 MeV, the masses, cutoff parameters and initial coupling strengths of RLF are obtained by fitting scattering observables of WF16 at incident energy of 200 MeV. With the masses, cutoff parameters and initial coupling strengths as input, the energy-dependent RLF has been constructed over the laboratory energy range from 20 to 800 MeV within a unified fits. To examine the validity of this fit, we then investigate p+$^{208}\rm{Pb}$ elastic scattering for various energies. Although the scattering observables of pp and pn of 200 MeV best fit the values of WF16, the RLF of 200 MeV without the Pauli blocking (PB) corrections fails to describe the experimental differential cross sections, analyzing powers and spinrotation functions. When the PB corrections are taken into account for various energies, the RLF model can well describe the experimental data of p+$^{208}\rm{Pb}$ elastic scattering.

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Symmetry potentials and in-medium nucleon-nucleon cross sections within the Nambu–Jona-Lasinio model in relativistic impulse approximation

Cited by 4 publications

References 77 publications

Nuclear Potentials Relevant to the Symmetry Energy in Chiral Models

Nuclear Potentials Relevant to the Symmetry Energy in Chiral Models

Nuclear potentials relevant to the symmetry energy in chiral models

Elastic scattering based on energy-dependent relativistic Love-Franey model at energies between 20 and 800 MeV*

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