Isospin coupling-channel decomposition of nuclear symmetry energy in covariant density functional theory

Abstract

The isospin coupling-channel decomposition of the potential energy density functional is carried out within the covariant density functional theory, and their isospin and density dependence in particular the influence on the symmetry energy is studied. It is found that both isospin-singlet and isospin-triplet components of the potential energy play the dominant role in deciding the symmetry energy, especially when the Fock diagram is introduced. The results illustrate a quite different mechanism to the origin of the symmetry energy from the microscopic Brueckner-Hartree-Fock theory, and demonstrate the importance of the Fork diagram in the CDF theory, especially from the isoscalar mesons, in the isospin properties of the in-medium nuclear force at high density.

5 pages, 3 figures, 3 tables

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• Pseudo-spin symmetry restoration and the in-medium balance between nuclear attractive and repulsive interactions
• Relativistic interpretation on the nature of nuclear tensor force
• Critical parameters of liquid-gas phase transition in thermal symmetric and asymmetric nuclear matter
• Quenched Λ spin-orbit splitting by relativistic Fock diagram in single-Λ hypernuclei
• The nuclear symmetry energy from relativistic Brueckner-Hartree-Fock model
• Moments of inertia of neutron stars in relativistic mean field theory: the role of the isovector scalar channel
• Density-dependent relativistic mean-field model for ${\Xi }^{-}$ hypernuclei
• Nucleon Short-Range Correlations and High-Momentum Dynamics: Implications on the Equation of State of Dense Matter
• Applicability of Relativistic Point-Coupling Models to Neutron Star Physics
• Charmed hypernuclei within density-dependent relativistic mean-field theory
• Impact of pion tensor force on alpha clustering in ${}^{20}$Ne
• An Undergraduate Approach to the Quantum Hadrodynamics and the Physics of Neutron Stars Part II: Neutron Stars' Exotic Content