Zg. Dai et Ks. Cheng, PROPERTIES OF DENSE MATTER IN A SUPERNOVA CORE IN THE RELATIVISTIC MEAN-FIELD THEORY, Astronomy and astrophysics, 330(2), 1998, pp. 569-577
We have used the Zimanyi & Moszkowski model in the relativistic mean-f
ield theory to study the properties of asymmetric nuclear matter and t
he equation of state (EOS) for supernova matter. We find that even tho
ugh muons are included in the chemical composition of neutron-star mat
ter, this model still results in a small proton concentration so that
only the modified Urea process occurs as a main neutrino reaction in n
eutron stars. This conclusion is opposite to that of the previous stud
ies in the relativistic mean-field theory. The incompressibility of sy
mmetric nuclear matter is consistent with both the experimental values
extracted from the nuclear physics and the constraints placed on the
EOS by observations of neutron star masses. If the EOS for supernova m
atter is described by this model, the prompt mechanism for Type II sup
ervovae cannot work, but the EOS is likely to be favourable to the del
ayed explosion mechanism.