DECOUPLING OF QUARK CONDENSATE FROM THE EFFECTIVE NUCLEON MASS AT HIGH-DENSITY (RHO) AND TEMPERATURE (T)

It is found that the quark condensate [(q) over bar q], instead of dec reasing at high rho, as commonly expected, starts to increase after a certain density (similar to 1.5 rho(0)) - in standard relativistic nuc lear matter models, However, when the models contain coupling constant s which are density dependent, [(q) over bar q] --> 0 at high rho and T, and in addition, the effective nucleon mass changes little, showing a decoupling of the mass from the condensate.