The quark-hadron phase transition at finite temperature and baryon chemical
potential is investigated in an extended NJL model with scalar-vector
eight-point interaction by comparing the pressure of symmetric nuclear matter
with that of the quark matter. As a result, the extended NJL phase diagram is
obtained in the temperature-baryon chemical potential plane and the effects of
the scalar-vector coupling constant G_{sv}^q on the chiral phase transition are
summarized. It is shown that a quarkyonic-like phase in which the chiral
symmetry is restored but the elementary excitation modes are nucleonic appears
just before deconfinement in this model.Comment: 15 pages, 12 figure
