Quark condensate and the mass of neutral vector meson at finite baryon densities

The chiral condensate and neutral vector-meson mass are investigated at finite nucleon density. It is shown, that in-medium nucleon mass modification may lead to the significant changes of the chiral condensate even at relatively low density. Also, the possible deviation from the QCD sum rules predicted approximate scaling behavior of the meson mass is analyzed. We found a strong dependence of the value of the in-medium effective vector-meson mass on the precise form of scaling law