Neutron Fraction and Neutrino Mean Free Path Predictions in Relativistic Mean Field Models

Details Neutron Fraction and Neutrino Mean Free Path Predictions in Relativistic Mean Field Models Neutron Fraction and Neutrino Mean Free Path Predictions in Relativistic Mean Field Models

2004-11-10

arxiv.org/abs/nucl-th/0411034v1

Phys.Rev. C70 (2004) 068801

Physics

Nuclear Physics

Nuclear Theory

4 pages, 5 figures, accepted for publication in Phys. Rev. C

Scientific paper

10.1103/PhysRevC.70.068801

The equation of state (EOS) of dense matter and neutrino mean free path (NMFP) in a neutron star have been studied by using relativistic mean field models motivated by effective field theory (ERMF). It is found that the models predict too large proton fractions, although one of the models (G2) predicts an acceptable EOS. This is caused by the isovector terms. Except G2, the other two models predict anomalous NMFP. In order to minimize the anomaly, besides an acceptable EOS, a large M* is favorable. A model with large M* retains the regularity in the NMFP even for a small neutron fraction.

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