Instabilities of relativistic mean field models and the role of nonlinear terms

Abstract

The instability of nuclear matter due to particle-hole excitation modes has been studied in the frame-work of several relativistic mean field (RMF) models. It is found that both the longitudinal and the transversal modes depend sensitively on the parameter sets used. The important impact of the vector and vector-scalar nonlinear terms on the stability of both modes is demonstrated. Our finding corroborates the result of previous studies, namely that certain RMF models cannot be used in high density applications. However, we show that for certain parameter sets of RMF models this shortcoming can be alleviated by adding these nonlinear terms.

11 pages, 5 figures, accepted in Phys. Rev. C, typos corrected

References in corpus (1)

• Constraints on the high-density nuclear equation of state from the phenomenology of compact stars and heavy-ion collisions

Cited by in corpus (3)

• Origin of the neutron skin thickness of 208Pb in nuclear mean-field models
• The breathing-mode giant monopole resonance and the surface compressibility in the relativistic mean-field theory
• Core-crust transition properties of neutron stars within systematically varied extended relativistic mean-field model