2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/192518The effects of higher order corrections of ring diagrams for the quark condensate are studied by using the bare vertex Nuclear Schwinger Dyson formalism based on $σ$-$ω$ model. At the high density the quark condensate is reduced by the higher order contribution of ring diagrams more than the mean field theory or the Hartree-Fock .Nuclear Theorytext