Univ Tubingen, Inst Theoret Phys, D-72076 Tubingen, Germany
; Acad Sinica, Inst High Energy Phys, Beijing 100039, Peoples R China
; Peking Univ, Dept Tech Phys, Beijing 100871, Peoples R China
The phase transition of chiral symmetry restoration of nuclear matter is studied in the chiral SU(3) quark mean field model. For some kinds of confining potentials, there exists a critical density rho(c). When the baryon density is larger than rho(c), nuclear matter will be in the phase of chiral symmetry restoration. At critical density, the physical quantities change discontinuously. The critical density will become larger when the vector part of the confining potential increases.