Sigma-omega meson coupling and properties of nuclei and nuclear matter

Abstract

We have constructed a Lagrangian model (SIG-OM) with coupling of sigma and omega mesons in the relativistic mean-field theory. Properties of finite nuclei and nuclear matter have been explored with the new Lagrangian model. The study shows that with SIG-OM an excellent description of binding energies and charge radii of nuclei over a large range of isospin is achieved. With an incompressibility of nuclear matter K=265 MeV, it is also able to describe the breathing-mode isoscalar giant monopole resonance energies appropriately. It is shown that the high-density behaviour of the equation of state of nuclear and neutron matter with the sigma-omega coupling is significantly softer than the non-linear scalar coupling model.

19 pages, 4 figures; an extended version to appear in Nuclear Physics A

References in corpus (3)

• Neutron-Rich Nuclei in Heaven and Earth
• Constraints on the high-density nuclear equation of state from the phenomenology of compact stars and heavy-ion collisions
• Relativistic model for nuclear matter and atomic nuclei with momentum-dependent self-energies

Cited by in corpus (6)

• Relativistic Mean-Field Hadronic Models under Nuclear Matter Constraints
• Compiled Properties of Nucleonic Matter and Nuclear and Neutron Star Models from Non-Relativistic and Relativistic Interactions
• The breathing-mode giant monopole resonance and the surface compressibility in the relativistic mean-field theory
• Scalar-vector Lagrangian without nonlinear self-interactions of bosonic fields in the relativistic mean-field theory
• Strong correlation of the neutron star core-crust transition density with the $\sigma$-meson mass via vacuum polarization
• Novel features of asymmetric nuclear matter from terrestrial experiments and astrophysical observations of neutron stars