Hot nuclear matter in the quark meson coupling model

Panda, P. K.; Mishra, Amruta; Eisenberg, J.M.; Greiner, Walter

doi:10.1103/physrevc.56.3134

Cited by 69 publications

(72 citation statements)

References 25 publications

(40 reference statements)

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“…In the simple QMC model, the bag parameter B is taken as B 0 corresponding to its value for a free nucleon. The medium effects are taken into account in the modified QMC model by the following ansatz for the bag parameter [13,3]…”

Section: Qmc Model For Nuclear Matter At Finite Temperaturementioning

confidence: 99%

Deconfinement in the quark meson coupling model

Zakout

Jaqaman

1999

Phys. Rev. C

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The Quark Meson Coupling Model which describes nuclear matter as a collection of non-overlapping MIT bags interacting by the self-consistent exchange of scalar and vector mesons is used to study nuclear matter at finite temperature. In its modified version, the density dependence of the bag constant is introduced by a direct coupling between the bag constant and the scalar mean field. In the present work, the coupling of the scalar mean field with the constituent quarks is considered exactly through the solution of the Dirac equation. Our results show that a phase transition takes place at a critical temperature around 200 MeV in which the scalar mean field takes a nonzero value at zero baryon density. Furthermore it is found that the bag constant decreases significantly when the temperature increases above this critical temperature indicating the onset of quark deconfinement.

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Section: Qmc Model For Nuclear Matter At Finite Temperaturementioning

confidence: 99%

Deconfinement in the quark meson coupling model

Zakout

Jaqaman

1999

Phys. Rev. C

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“…r 2 0q k 2 (11) and f N N π can be obtained from the Goldberg-Triemann relation by using the axial-vector coupling-constant value g A in this model. The one-gluon exchange contribution to the mass is separated into two parts as…”

Section: Quark Mean Field Model With Pion and Gluon Correctionsmentioning

confidence: 99%

“…With the development of the QMC model persistently, it is not only applied on the study of nuclear structure, but also on the hadron physics, astrophysics and particle physics [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Quark mean field model with pion and gluon corrections

Xing

Shen

2016

Phys. Rev. C

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The properties of nuclear matter and finite nuclei are studied within the quark mean field (QMF) model by taking the effects of pion and gluon into account at the quark level. The nucleon is described as the combination of three constituent quarks confined by a harmonic oscillator potential. To satisfy the spirit of QCD theory, the contributions of pion and gluon on the nucleon structure are treated in second-order perturbation theory. For the nuclear many-body system, nucleons interact with each other by exchanging mesons between quarks. With different constituent quark mass, m q , we determine three parameter sets about the coupling constants between mesons and quarks, named as QMF-NK1, QMF-NK2, and QMF-NK3 by fitting the ground-state properties of several closed-shell nuclei. It is found that all of the three parameter sets can give satisfactory description on properties of nuclear matter and finite nuclei, meanwhile they can also predict the larger neutron star mass around 2.3M ⊙ without the hyperon degrees of freedom.

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“…With such a hope, there has been several attempts based on a simple bag model or some phenomenological potential models to address the nucleon structure. Using such quark-meson coupling (QMC) models nuclear equations of state (EOS) have also been constructed [23,24] and properties of nuclear matter have been studied in great detail in a series of works by Saito, Thomas, and collaborators [25] and by others [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Nuclear equation of state in a relativistic independent quark model with chiral symmetry and dependence on quark masses

et al. 2013

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We have calculated the properties of nuclear matter in a self-consistent manner with a quark-meson coupling mechanism incorporating the structure of nucleons in vacuum through a relativistic potential model; where the dominant confining interaction for the free independent quarks inside a nucleon is represented by a phenomenologically average potential in equally mixed scalar-vector harmonic form. Corrections due to spurious center of mass motion as well as those due to other residual interactions, such as the one gluon exchange at short distances and quark-pion coupling arising out of chiral symmetry restoration, have been considered in a perturbative manner to obtain the nucleon mass in vacuum. The nucleon-nucleon interaction in nuclear matter is then realized by introducing additional quark couplings to σ and ω mesons through mean field approximations. The relevant parameters of the interaction are obtained self-consistently while realizing the saturation properties such as the binding energy, pressure, and compressibility of the nuclear matter. We also discuss some implications of chiral symmetry in nuclear matter along with the nucleon and nuclear σ term and the sensitivity of nuclear matter binding energy with variations in the light quark mass.

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Hot nuclear matter in the quark meson coupling model

Cited by 69 publications

References 25 publications

Deconfinement in the quark meson coupling model

Deconfinement in the quark meson coupling model

Quark mean field model with pion and gluon corrections

Nuclear equation of state in a relativistic independent quark model with chiral symmetry and dependence on quark masses

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