Naive versus mirror assignment at finite density: correlator mixing and chiral symmetry restoration

Chiral symmetry imposes some constraints on hadron correlation functions in dense media. These constraints imply a certain general structure of the two- and three-point correlation functions of chiral partners and lead to the effect of mixing arising from the interaction of the long-ranged nuclear pions with corresponding interpolating currents. It reflects the phenomena of partial restoration of chiral symmetry. We consider several possible pairs of chiral partners for both mesons and nucleons and analyse their mixing patterns. We explored both naive and mirror assignments for the chiral partner of nucleons. (paper)