Strange nuclear matter within Brueckner-Hartree-Fock theory
نویسندگان
چکیده
We have developed a formalism for microscopic Brueckner-type calculations of dense nuclear matter that includes all types of baryon–baryon interactions and allows to treat any asymmetry on the fractions of the different species (n, p,Λ,Σ−,Σ0,Σ+,Ξ− and Ξ0). We present results for the different single–particle potentials focussing on situations that can be relevant in future microscopic studies of beta-stable neutron star matter with strangeness. We find that both the hyperon-nucleon and hyperon-hyperon interactions play a non-negligible role in determining the chemical potentials of the different species. PACS numbers: 26.60.+c, 21.65.+f, 13.75Ev, 21.30.-x
منابع مشابه
Nucleon effective masses within the Brueckner-Hartree-Fock theory: Impact on stellar neutrino emission
We calculate the effective masses of neutrons and protons in dense nuclear matter within the microscopic Brueckner-Hartree-Fock many-body theory and study the impact on the neutrino emissivity processes of neutron stars. We compare results based on different nucleon-nucleon potentials and nuclear three-body forces. Useful parametrizations of the numerical results are given. We find substantial ...
متن کاملar X iv : n uc l - th / 9 90 90 19 v 1 9 S ep 1 99 9 Strange nuclear matter within Brueckner - Hartree - Fock theory
We have developed a formalism for microscopic Brueckner-type calculations of dense nuclear matter that includes all types of baryon–baryon interactions and allows to treat any asymmetry on the fractions of the different and Ξ 0). We present results for the different single–particle potentials focussing on situations that can be relevant in future microscopic studies of beta-stable neutron star ...
متن کاملSelf-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
متن کاملSymmetric and asymmetric nuclear matter in the relativistic approach at finite temperatures
The properties of hot matter are studied in the frame of the relativistic Brueckner-Hartree-Fock theory. The equations are solved self-consistently in the full Dirac space. For the interaction we used the potentials given by Brockmann and Machleidt. The obtained critical temperatures are smaller than in most of the nonrelativistic investigations. We also calculated the thermodynamic properties ...
متن کاملSymmetric and asymmetric nuclear matter in the relativistic approach.
The properties of hot matter are studied in the frame of the relativistic Brueckner-Hartree-Fock theory. The equations are solved self-consistently in the full Dirac space. For the interaction we used the potentials given by Brockmann and Machleidt. The obtained critical temperatures are smaller than in most of the nonrelativistic investigations. We also calculated the thermodynamic properties ...
متن کامل