Nuclear matter properties in the relativistic mean field model with sigma-omega coupling

Details Nuclear matter properties in the relativistic mean field model with sigma-omega coupling Nuclear matter properties in the relativistic mean field model with sigma-omega coupling

2000-11-07

arxiv.org/abs/nucl-th/0011025v1

Eur.Phys.J. A11 (2001) 137-141

Physics

Nuclear Physics

Nuclear Theory

5 pages and 3 figures

Scientific paper

10.1007/s100500170078

The possibility of extending the linear sigma-omega model by introducing a sigma-omega coupling phenomenologically is explored. It is shown that, in contrast to the usual Walecka model, not only the effective nucleon mass M* but also the effective sigma meson mass m*_sigma and the effective omega meson mass m*_omega are nucleon density dependent. When the model parameters are fitted to the nuclear saturation point (the nuclear radius constant r_0=1.14fm and volume energy a_1=16.0MeV) as well as to the effective nucleon mass M*=0.85M, the model yields m*_sigma=1.09m_sigma and m*_omega=0.90m_omega at the saturation point, and the nuclear incompressibility K_0=501MeV. The lowest value of K_0 given by this model by adjusting the model parameters is around 227MeV.

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