Influence of coupling constants on nuclear symmetry energy

  • By studying the energy of neutron star matter, we discuss the nuclear symmetry energy at different baryon densities and different coupling constants in the relativistic mean field approximation. The results show that the symmetry energy increases with baryon density at various coupling constants and incompressibilities. Furthermore, the symmetry energy at saturation density increases with increasing incompressibility at fixed d, and decreases at fixed c. Specifically, when coupling constants gv and gs are fixed, respectively, the symmetry energy has a little change with increasing incompressibility. It is demonstrated that the NN coupling constants have greater influences on the symmetry energy than the self-coupling constants.
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LIU Bei-Bei, OUYANG Fei and CHEN Wei. Influence of coupling constants on nuclear symmetry energy[J]. Chinese Physics C, 2013, 37(4): 044103. doi: 10.1088/1674-1137/37/4/044103
LIU Bei-Bei, OUYANG Fei and CHEN Wei. Influence of coupling constants on nuclear symmetry energy[J]. Chinese Physics C, 2013, 37(4): 044103.  doi: 10.1088/1674-1137/37/4/044103 shu
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Received: 2012-05-22
Revised: 1900-01-01
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Influence of coupling constants on nuclear symmetry energy

    Corresponding author: LIU Bei-Bei,
    Corresponding author: CHEN Wei,

Abstract: By studying the energy of neutron star matter, we discuss the nuclear symmetry energy at different baryon densities and different coupling constants in the relativistic mean field approximation. The results show that the symmetry energy increases with baryon density at various coupling constants and incompressibilities. Furthermore, the symmetry energy at saturation density increases with increasing incompressibility at fixed d, and decreases at fixed c. Specifically, when coupling constants gv and gs are fixed, respectively, the symmetry energy has a little change with increasing incompressibility. It is demonstrated that the NN coupling constants have greater influences on the symmetry energy than the self-coupling constants.

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