Quark–hadron matter at finite temperature and density in a two-color PNJL model

Quark–hadron matter at finite temperature and density is studied using a two-flavor, color image (P)NJL model. The hadronic effective Lagrangian, derived by bosonization of the quark fields and renormalized using the Eguchi method, emerges in the form of an extended linear σ model with meson and diquark-baryon fields. Chiral and diquark condensates are studied as functions of temperature and baryon density. Masses of mesons and diquark-baryons are calculated with and without the Polyakov loop effect. We investigate the equation of state of quark–hadron matter by taking into account the contributions of mesons and diquark-baryons in addition to the quark quasiparticles.