Modified Quark-Meson Coupling Model for Nuclear Matter

Abstract

The quark-meson coupling model for nuclear matter, which describes nuclear matter as non-overlapping MIT bags bound by the self-consistent exchange of scalar and vector mesons, is modified by introducing medium modification of the bag constant. We model the density dependence of the bag constant in two different ways: one invokes a direct coupling of the bag constant to the scalar meson field, and the other relates the bag constant to the in-medium nucleon mass. Both models feature a decreasing bag constant with increasing density. We find that when the bag constant is significantly reduced in nuclear medium with respect to its free-space value, large canceling isoscalar Lorentz scalar and vector potentials for the nucleon in nuclear matter emerge naturally. Such potentials are comparable to those suggested by relativistic nuclear phenomenology and finite-density QCD sum rules. This suggests that the reduction of bag constant in nuclear medium may play an important role in low- and medium-energy nuclear physics.

Part of the text is reordered, revised version to appear in Phys. Rev. C. 19 pages, ReVTeX, 4 figures embedded

References in corpus (13)

• Enhancement of low-mass dileptons in heavy-ion collisions
• Chiral Restoration in Hot and/or Dense Matter
• Analysis of Chiral Mean-Field Models for Nuclei
• QCD Sum Rules and Applications to Nuclear Physics
• Vacuum Contributions in a Chiral Effective Lagrangian for Nuclei
• From Chiral Mean Field to Walecka Mean Field and Kaon Condensation
• Valid QCD Sum Rules for Vector Mesons in Nuclear Matter
• Recovering Relativistic Nuclear Phenomenology from the Quark-Meson Coupling Model
• An Effective Lagrangian with Broken Scale and Chiral Symmetry II: Pion Phenomenology
• Quark-meson coupling model for finite nuclei
• Composite nucleons in scalar and vector mean-fields
• Effect of Nucleon Structure Variation in Super-allowed Fermi Beta-decay
• What does a change in the quark condensate say about restoration of chiral symmetry in matter?

Cited by in corpus (52)

• Nucleon and hadron structure changes in the nuclear medium and impact on observables
• Charmed Mesic Nuclei: Bound D and $\bar{D}$ states with ^{208}Pb
• Heavy baryon/meson ratios in relativistic heavy ion collisions
• The quark-meson coupling model for Lambda, Sigma and Xi hypernuclei
• Neutron star properties in the quark-meson coupling model
• In-medium electron-nucleon scattering
• Hybrid stars in the quark-meson coupling model with superconducting quark matter
• Properties of charmed and bottom hadrons in nuclear matter: A plausible study
• Hot Nuclear Matter in the Quark Meson Coupling Model
• Self-consistent description of $\Lambda$ hypernuclei in the quark-meson coupling model
• Medium effects of magnetic moments of baryons on neutron stars under strong magnetic fields
• Light Front Quantization--A Technique for Relativistic and Realistic Nuclear Physics
• Fock terms in the quark-meson coupling model
• Density Dependence of Nucleon Bag Constant, Radius and Mass in an Effective Field Theory Model of QCD
• ${\Lambda }_c^{+}$, ${\Sigma }_c$, ${\Xi }_c$ and ${\Lambda }_b$ hypernuclei in the quark-meson coupling model
• Medium dependence of the bag constant in the quark-meson coupling model
• Quark mass density- and temperature- dependent model for bulk strange quark matter
• Holographic Nuclear Matter in AdS/QCD
• Change of MIT Bag Constant in Nuclear Medium and Implication for the EMC Effect
• A consistent thermodynamic treatment for quark mass density-dependent model
• Nuclear Matter Properties of the Modified Quark Meson Coupling Model
• Correlated two-pion exchange and large-N(C) behavior of nuclear forces
• Warm asymmetric matter in the Quark Meson Coupling Model
• Critical analysis of quark-meson coupling models for nuclear matter and finite nuclei
• Excluded Volume Effects in the Quark Meson Coupling Model
• The neutron charge form factor in helium-3
• Chiral symmetry and strangeness content in nuclear physics parametrized by a medium dependent bag constant
• The nucleon-sigma coupling constant in QCD Sum Rules
• Deconfinement in the Quark Meson Coupling Model
• Nucleon radius effects on neutron stars in quark mean field model
• Improved quark mass density- dependent model with quark-sigma meson and quark-omega meson couplings
• Reevaluation of the density dependence of nucleon radius and mass in the global color symmetry model of QCD
• Magnetic moment of hyperons in nuclear matter by using quark-meson coupling models
• The Nuclear matter stability in a non-local chiral quark model
• Light-Front Nuclear Physics: Mean Field Theory for Finite Nuclei
• ${\Theta }^{+}$ hypernuclei in relativistic mean field model
• Quark deconfinement phase transition for improved quark mass density-dependent model
• Quark-meson coupling model for a nucleon
• Thermal kaons production in the relativistic heavy ions collision
• Quark-Meson Coupling Model for a Nucleon
• Temperature Dependence of the Effective Bag Constant and the Radius of a Nucleon in the Global Color Symmetry Model of QCD
• Self-consistent quantum effects in the quark meson coupling model
• Hot Hypernuclear Matter in the Modified Quark Meson Coupling Model
• $\delta$ meson effects on neutron stars in the modified quark-meson coupling model
• Hot Nuclear Matter in the Quark Meson Coupling Model with Dilatons
• Effects of Meson Mass Reduction on the Properties of Neutron Star Matter
• Properties of Dense Strange Hadronic Matter with Quark Degrees of Freedom
• Hadron Masses in Medium and Neutron Star Properties
• Nuclear equation of state and finite nucleon volumes
• Effective mass and decay of ${\Theta }^{+}$ in nuclear matter in quark-meson coupling model
• Hot nuclear matter in the modified quark-meson coupling model with quark-quark correlations
• Phase Structure of Compact Star in Modified Quark-Meson Coupling Model