Self-consistent inclusion of pion polarisation in the relativistic Dirac-Brueckner approach to nuclear matter

The Relativistic Dirac-Brueckner Approach to Nuclear Matter

An overview on the relativistic Dirac-Brueckner approach to the nuclear many-body problem is given. Different approximation schemes are discussed, with particular emphasis on the nuclear self-energy and the saturation mechanism of nuclear matter. I will further discuss extensions of the standard approach, amongst other things the inclusion of non-nucleonic degrees of freedom, many-body forces a...

Asymmetric Nuclear Matter in the Relativistic Brueckner Hartree Fock approach

We present a calculation of asymmetric nuclear matter properties in a relativistic Brueckner Hartree Fock framework. Following other calculations the components of the self-energies are extracted by projecting on Lorentz invariant amplitudes. It is shown that for asymmetric nuclear matter one needs a sixth invariant. We present a set of invariants which in the limit of symmetric nuclear matter ...

Self-consistent single-nucleon and single-Λ potentials in strange nuclear matter with the Dirac-Brueckner-Hartree-Fock approach

We calculate self-consistent single-nucleon and single-Λ potentials in hyperonic matter for different Λ concentrations. The predictions include relativistic Dirac effects as reported previously in a calculation of the Λ binding energy in symmetric nuclear matter. We discuss the dependence on momentum, density, and Λ fraction. PACS number(s): 21.65.+f,21.80.+a

Momentum-dependent mean field based upon the Dirac-Brueckner approach for nuclear matter.

A momentum-dependent mean field potential, suitable for application in the transport-model description of nucleus-nucleus collisions, is derived in a microscopic way. The derivation is based upon the Bonn meson-exchange model for the nucleon-nucleon interaction and the Dirac-Brueckner approach for nuclear matter. The properties of the microscopic mean field are examined and compared with phenom...

The Dirac - Brueckner Approach 1