Neutron Stars in Non-Linear Coupling Models

Details Neutron Stars in Non-Linear Coupling Models Neutron Stars in Non-Linear Coupling Models

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ranp.conf..441t&link_type=abstract

RELATIVISTIC ASPECTS OF NUCLEAR PHYSICS. Proceedings of the Sixth International Workshop. Held 17-20 October 2000 in Caraguatatu

Physics

Nuclear Physics

Scientific paper

We present a class of relativistic models for nuclear matter and neutron stars which exhibits a parameterization, through mathematical constants, of the non-linear meson-baryon couplings. For appropriate choices of the parameters, it recovers current QHD models found in the literature: Walecka, ZM and ZM3 models. We have found that the ZM3 model predicts a very small maximum neutron star mass, ~ 0.72M&sun;. A strong similarity between the results of ZM-like models and those with exponential couplings is noted. Finally, we discuss the very intense scalar condensates found in the interior of neutron stars which may lead to negative effective masses.

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