35 research outputs found
Constructing Effective Pair Wave Function from Relativistic Mean Field Theory with a Cutoff
We propose a simple method to reproduce the ^1S_0 pairing properties of
nuclear matter, which are obtained using a sophisticated model, by introducing
a density-independent cutoff into the relativistic mean field model. This can
be applied successfully to the physically relevant density range.Comment: 9 pages, 4 figure
Kaon Condensation and the Non-Uniform Nuclear Matter
Non-uniform structures of nuclear matter are studied in a wide density-range.
Using the density functional theory with a relativistic mean-field model, we
examine non-uniform structures at sub-nuclear densities (nuclear ``pastas'')
and at high densities, where kaon condensate is expected. We try to give a
unified view about the change of the matter structure as density increases,
carefully taking into account the Coulomb screening effects from the viewpoint
of first-order phase transition.Comment: Presented at "Tours Symposium on Nuclear Physics V
Coulomb screening effect on the nuclear-pasta structure
Using the density functional theory (DFT) with the relativistic mean field
(RMF) model, we study the non-uniform state of nuclear matter, ``nuclear
pasta''. We self-consistently include the Coulomb interaction together with
other interactions. It is found that the Coulomb screening effect is
significant for each pasta structure but not for the bulk equation of state
(EOS) of the nuclear pasta phase
Nuclear pasta structures and the charge screening effect
Non uniform structures of the nucleon matter at subnuclear densities are
numerically studied by means of the density functional theory with relativistic
mean-fields coupled with the electric field. A particular role of the charge
screening effects is demonstrated.Comment: 11 pages, 9 figures, submitted to PR
Effects of Meson Mass Decrease on Superfluidity in Nuclear Matter
We calculate the pairing gap in nuclear matter by adopting the
"in-medium Bonn potential" proposed by Rapp et al. [e-print nucl-th/9706006],
which takes into account the in-medium meson mass decrease, as the
particle-particle interaction in the gap equation. The resulting gap is
significantly reduced in comparison with the one obtained by adopting the
original Bonn potential.Comment: 10 pages, 3 figures, uses elsart. Text has been revised. To appear in
Phys. Lett.
Phenomenological construction of a relativistic nucleon-nucleon interaction for the superfluid gap equation in finite density systems
We construct phenomenologically a relativistic particle-particle channel
interaction which suits the gap equation for nuclear matter. This is done by
introducing a density-independent momentum-cutoff parameter to the relativistic
mean field (Hartree and Hartree-Fock) models so as to reproduce the pairing
properties obtained by the Bonn-B potential and not to change the saturation
property. The interaction so obtained can be used for the Relativistic
Hartree-Bogoliubov calculation, but some reservation is necessary for the
Relativistic Hartree-Fock-Bogoliubov calculation.Comment: 30 pages, 18 eps figures, uses elsart. Major revision ---
Hartree-Fock calculations are added. To appear in Nuclear Physics
Finite size effects on kaonic pasta structures
Non-uniform structures of mixed phases at the first-order phase transition to
charged kaon condensation are studied using a density functional theory within
the relativistic mean field model. Including electric field effects and
applying the Gibbs conditions in a proper way, we numerically determine density
profiles of nucleons, electrons and condensed kaons. Importance of charge
screening effects is elucidated and thereby we show that the Maxwell
construction is effectively justified. Surface effect is also studied to figure
out its effect on the density profiles