Hyperon-rich Matter in Neutron Stars

Details Hyperon-rich Matter in Neutron Stars Hyperon-rich Matter in Neutron Stars

1995-06-15

arxiv.org/abs/nucl-th/9506011v3

Phys.Rev.C53:1416-1429,1996

Physics

Nuclear Physics

Nuclear Theory

28 pages, 8 postscript figures

Scientific paper

10.1103/PhysRevC.53.1416

We study the equation of state of hyperon-rich matter for neutron stars using an extended relativistic mean-field model. We take special care of the recently proposed non-linear behaviour of the vector field which gives a much better description of Dirac-Brueckner calculations. The hyperon-hyperon interaction is also implemented by introducing additional meson exchanges. These new terms avoid the instability found at high densitites in previous works while keeping the excellent description for finite nuclear systems. We also demonstrate within the mean-field approach that the presence of hyperons inside neutron stars on one hand and the hyperon-hyperon interactions on the other hand make the onset of kaon condensation less favourable.

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