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

Zhao Qian; Sun Bao-Yuan; Long Wen-Hui

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

Zhao Qian,Sun Bao-Yuan * #,Long Wen-Hui

Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000

*Correspondence author

#Submitted by

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Funding: National Natural Science Foundation of China （No.11205075 and 11375076）, Specialized Research Fund for the Doctoral Program of Higher Education （No.20120211120002）

Opened online:26 November 2014

Accepted by: none

Citation: Zhao Qian,Sun Bao-Yuan,Long Wen-Hui.Isospin coupling-channel decomposition of nuclear symmetry energy in covariant density functional theory[OL]. [26 November 2014] http://en.paper.edu.cn/en_releasepaper/content/4619162

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, especially from the isoscalar mesons, in the isospin properties of the in-medium nuclear force at high density.

Keywords:nuclear physics; covariant density functional theory; nuclear matter; symmetry energy; effective interaction

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