Difference between neutron and proton effective masses as a function of the baryon density.
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In the nonlinear relativistic mean field model, the isospin splitting of the effective nucleon mass is primarily determined by the coupling strength of the $\delta$ meson. The large coupling strength of the $\delta$ meson results in large isospin splitting of the effective nucleon mass. When the coupling strength of the $\delta$ meson is zero (set1), there is no isospin splitting of the effective nucleon mass.
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Science Data Bank创建时间：
2023-12-22
