Relativistic Mean Field Model with Generalized Derivative Nucleon-Meson Couplings

Abstract

The quantum hadrodynamics (QHD) model with minimal nucleon-meson couplings is generalized by introducing couplings of mesons to derivatives of the nucleon field in the Lagrangian density. This approach allows an effective description of a state-dependent in-medium interaction in the mean-field approximation. Various parametrizations for the generalized couplings are developed and applied to infinite nuclear matter. In this approach, scalar and vector self-energies depend on both density and momentum similarly as in the Dirac-Brueckner theory. The Schrödiger-equivalent optical potential is much less repulsive at high nucleon energies as compared to standard relativistic mean field models and thus agrees better with experimental findings. The derivative couplings in the extended model have significant effects on properties of symmetric nuclear matter and neutron matter.

35 pages, 1 table, 10 figures

Cited by in corpus (14)

• Recent Progress and New Challenges in Isospin Physics with Heavy-Ion Reactions
• Equations of state for supernovae and compact stars
• Reaction Dynamics with Exotic Beams
• Relativistic Nuclear Energy Density Functionals: adjusting parameters to binding energies
• Relativistic model for nuclear matter and atomic nuclei with momentum-dependent self-energies
• Isospin-dependent properties of asymmetric nuclear matter in relativistic mean-field models
• Probing the Nuclear Symmetry Energy with Heavy Ion Collisions
• Calculation of beta-decay rates in a relativistic model with momentum-dependent self-energies
• Relativistic Mean-Field Models with Effective Hadron Masses and Coupling Constants, and rho^- Condensation
• Versatility of field theory motivated nuclear effective Lagrangian approach
• Parametrisations of relativistic energy density functionals with tensor couplings
• Momentum dependent mean-field dynamics of compressed nuclear matter and neutron stars
• Neutron star equations of state with optical potential constraint
• Nuclear structure far from stability