In the framework of Brueckner-Bethe-Goldstone theory, we determine a fully microscopic equation state for asymmetric and $\beta$-stable nuclear matter containing $\sim$ $\la$ hyperons. We use Paris new Argonne $Av_{18}$ two-body nucleon interaction, whereas nucleon-hyperon interaction is described by Njimegen soft-core model. stress role played three-body which produces strong repulsion at high densities. This enhances enormously hyperon population, softening state, turns out almost...

The equation of state symmetric nuclear matter at zero temperature is calculated up to the three hole-line level approximation in Bethe-Brueckner-Goldstone expansion. Both standard and continuous choices for single particle auxiliary potential are considered. resulting shows independence from choice a high degree accuracy. This result gives strong evidence convergence expansion establishes saturation curve adopted nucleon-nucleon interaction, Argonne ${v}_{14}$ potential.

We study the hadron-quark phase transition in interior of neutron stars (NS's). calculate equation state (EOS) hadronic matter using Brueckner-Bethe-Goldstone formalism with realistic two-body and three-body forces, as well a relativistic mean field model. For quark we employ MIT bag model constraining constant by indications coming from recent experimental results obtained at CERN SPS on formation quark-gluon plasma. find necessary to introduce density dependent parameter, corresponding...

A new version of the Barcelona-Catania-Paris energy functional is applied to a study nuclear masses and other properties. The largely based on calculated ab initio neutron matter equations state. Compared typical Skyrme functionals having 10--12 parameters apart from spin-orbit pairing terms, has only 2 or 3 adjusted parameters, fine tuning binding fixing surface finite nuclei. An rms value 1.58 MeV obtained fit these three 579 measured reported in Audi Wapstra [Nucl. Phys. 729, 337 (2003)]...

The microscopic theory of the nuclear matter equation state at finite temperature is developed within Bloch--De Dominicis diagrammatic expansion. liquid gas phase transition symmetric identified, with a critical ${T}_{c}\ensuremath{\approx}20 \mathrm{MeV},$ using Argonne ${v}_{14}$ as bare $\mathrm{NN}$ interaction and phenomenological three-body force adjusted to give correct saturation point. Pure neutron asymmetric matter, relevant supernovae explosions, are also studied. It found that...

We determine fully self-consistent single-particle potentials and chemical of nucleons hyperons in asymmetric nuclear matter, using an extended Brueckner-Hartree-Fock formalism. carefully analyze the onset ${\ensuremath{\Sigma}}^{\ensuremath{-}}$ $\ensuremath{\Lambda}$ formation $\ensuremath{\beta}$ stable charge neutral matter. The role played by three-body nucleon interaction is widely discussed. results indicate that sets at about (2--3) times normal matter density, for all different...

The process of deuteron formation in intermediate heavy ion reactions is approached within the strong coupling BCS theory assuming that final stage reaction can be described as an adiabatic expansion a piece nuclear matter. Since gap equation $^{3}$${\mathit{S}}_{1}$${\mathrm{\ensuremath{-}}}^{3}$${\mathit{D}}_{1}$ channel goes over into Schr\"odinger low density limit, smooth transition from superfluid Cooper pair phase to Bose gas found. For fixed entropy ranging 0.5 2 units per particle...

A non-relativisitic nuclear density functional theory is constructed, not as usual, from an effective dependent nucleon-nucleon force but directly introducing in the results microscopic and neutron matter Bruckner G-matrix calculations at various densities. purely phenomenological finite range part to account for surface properties added. The striking result that only four five adjustable parameters, spin-orbit included, suffice reproduce binding energies radii with same quality obtained...

We derive a new equation of state (EoS) for neutron stars (NS) from the outer crust to core based on modern microscopic calculations using Argonne v18 potential plus three-body forces computed with Urbana model. To deal inhomogeneous structures matter in NS crust, we use recent nuclear energy density functional that is directly same calculations, and which able reproduce ground-state properties nuclei along periodic table. The EoS requires masses neutron-rich nuclei, are obtained through...

We present calculations of the energy per particle pure neutron and symmetric nuclear matter with simplified Argonne nucleon-nucleon potentials for different many-body theories. compare critically Brueckner-Hartree-Fock results to other formalisms, such as Brueckner-Bethe-Goldstone expansion up third order, self-consistent Green's functions, auxiliary field diffusion Monte Carlo, Fermi hypernetted chain. evaluate importance spin-orbit tensor correlations in equation state find these be...

We calculate the effective masses of neutrons and protons in dense nuclear matter within microscopic Brueckner-Hartree-Fock many-body theory study impact on neutrino emissivity processes neutron stars. compare results based different nucleon-nucleon potentials three-body forces. Useful parametrizations numerical are given. find substantial in-medium suppression emissivities, strongly dependent interactions.

We determine in an extended Brueckner-Hartree-Fock formalism self-consistent single-particle potentials of nucleons, lambda, and sigma hyperons for a system consisting symmetric nuclear matter lambda uniform densities ${\ensuremath{\rho}}_{N}$ ${\ensuremath{\rho}}_{\ensuremath{\Lambda}},$ respectively. The binding energy per baryon this is discussed its maximum strangeness content preserving evaluated. results are used to introduce hyperonic symmetry term generalized mass formula...

We present results for the ${}^{3}{P}_{2}{\ensuremath{-}}^{3}{F}_{2}$ pairing gap in neutron matter with several realistic nucleon-nucleon potentials, particular recent phase-shift-equivalent potentials. find that their predictions cannot be trusted at densities above $\ensuremath{\rho}\ensuremath{\approx}1.7{\ensuremath{\rho}}_{0},$ where ${\ensuremath{\rho}}_{0}$ is saturation density symmetric nuclear matter. In order to make density, potential models which fit phase shifts up about 1 GeV...

A separable representation of the Paris interaction is used as input for investigation various nuclear matter properties. The faithfulness checked by comparison with results previously obtained from original interaction. Calculations are performed four different values Fermi momentum, namely ${\mathit{k}}_{\mathit{F}}$=1.10, 1.36, 1.55, and 1.75 ${\mathrm{fm}}^{\mathrm{\ensuremath{-}}1}$. One evaluates contributions to quasiparticle potential energy that first, second, third order in...