Hyperon masses in nuclear matter

Hyperon masses in nuclear matter.

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...

Comment on : “ Meson Masses in Nuclear Matter ”

Effective hadron masses and couplings in nuclear matter and incompressibility

The role of effective hadron masses and effective couplings in nuclear matter is studied using a generalized effective Lagrangian for σ-ω model. A simple relation among the effective masses, the effective couplings and the incompressibility K is derived. Using the relation, it is found that the effective repulsive and the effective attractive forces are almost canceled to each other at the norm...

0 Hyperon - hyperon interactions and properties of neutron star matter

We present results from Brueckner–Hartree–Fock calculations for β-stable neutron star matter with nucleonic and hyperonic degrees of freedom, employing the most recent parametrizations of the baryon-baryon interaction of the Nijmegen group. It is found that the only strange baryons emerging in β-stable matter up to total baryonic densities of 1.2 fm −3 are Σ − and Λ. The corresponding equations...

Hyperon-hyperon interactions and properties of neutron star matter

We present results from Brueckner-Hartree-Fock calculations for b-stable neutron star matter with nucleonic and hyperonic degrees of freedom, employing the most recent parametrizations of the baryon-baryon interaction of the Nijmegen group. It is found that the only strange baryons emerging in b-stable matter up to total baryonic densities of 1.2 fm are S and L . The corresponding equations of ...