In recent years, the interest in correlations inside nuclei became an important issue in nuclear physics. On the theoretical, side several calculations using different models including short-range correlation have been done for nuclear matter. However, there is still not much known about the role of correlations in neutron star matter containing hyperons. In our work we examined dynamical corre...

We analyze hyperon and nucleon mass shifts in nuclear matter using chiral perturbation theory. Expressions for the mass shifts that include strong interaction effects at leading order in the density are derived. Corrections to our results are suppressed by powers of the Fermi momentum divided by either the chiral symmetry breaking scale or the nucleon mass. Our work is relevant for neutron star...

The protons and neutrons in a nucleus can form strongly correlated nucleon pairs. Scattering experiments, in which a proton is knocked out of the nucleus with high-momentum transfer and high missing momentum, show that in carbon-12 the neutron-proton pairs are nearly 20 times as prevalent as proton-proton pairs and, by inference, neutron-neutron pairs. This difference between the types of pairs...

We have investigated the unstable spinodal region of asymmetric nuclear matter in the extended Zimanyi-Moszkowski (EZM) model. It is found that the model produces larger spinodal region, higher upper-density boundary and maximum asymmetry, than the familiar nonlinear Walecka model. This is due to the renormalized vector-meson coupling constants in the EZM model. Recent experimental developments...

The properties of nuclear matter are studied in the framework of quantum hadrodynamics. Assuming an o-meson field, periodic in space, a self-consistent set of equations is derived in the mean-field approximation for the description of nucleons interacting via U-meson and w-meson fields. Solutions of these self-consistent equations have been found: The baryon density is constant in space, howeve...

A method for the description of spin-isospin phase transitions in nuclear matter is developed. It aliows a complete description of the pion condensation phase transition in the framework of the Landau-Migdal Fermi liquid theory. The equation of the order Parameter is derived and the condensation energy is calculated. We study the influence of pion condensation on the nuclear equation of state a...

We study the latent heat of the liquid-gas phase transition in symmetric nuclear matter using self-consistent mean-field calculations with a few Skyrme forces. The temperature dependence of the latent heat is rather independent of the mean-field parametrization and can be characterized by a few parameters. At low temperatures, the latent heat tends to the saturation energy. Near the critical po...

The aim of high energy nuclear collisions is to study the transition from hadronic matter to a plasma of deconfined quarks and gluons. I review the basic questions of this search and summarize recent theoretical developments in the field. 1. New States of Matter Statistical QCD predicts that high temperatures and baryon densities will lead to new states of strongly interacting matter. Increasin...

We calculate the equation of state of isospin-symmetric nuclear matter in the threeloop approximation of chiral perturbation theory. The contributions to the energy per particle Ē(kf ) from oneand two-pion exchange diagrams are ordered in powers of the Fermi momentum kf (modulo functions of kf/mπ). It is demonstrated that, already at orderO(k4 f ), two-pion exchange produces realistic nuclear b...

We discuss properties of quark matter at finite baryon densities and zero temperature in a Vlasov approach. We use a screened interquark Richardson's potential consistent with the indications of Lattice QCD calculations. We analyze the choices of the quark masses and the parameters entering the potential which reproduce the binding energy (B.E.) of infinite nuclear matter. There is a transition...