In this paper, we investigate the hadron-quark (HQ) phase transition occurs beyond the chiral phase transition in the nuclear matter. The results show that there exits a quarkyonic-like phase, appeared just before deconfinement, when the chiral symmetry is restored but the elementary excitation modes are still nucleonic. | Communications in Physics, Vol. 27, No. 1 (2017), pp. 71-82 DOI: THERMODYNAMIC HADRON-QUARK PHASE TRANSITION OF CHIRAL NUCLEAR MATTER TO QUARK-GLUON PLASMA NGUYEN TUAN ANH † Faculty of Energy Technology. Electric Power University, 235 Hoang Quoc Viet, Hanoi, Vietnam † E-mail: Received 14 February 2017 Accepted for publication 01 March 2017 Abstract. After receiving very interesting results from investigations of chiral nuclear matter based on the extended Nambu-Jona–Lasinio model (ENJL) included the scalar-vector eight-point interaction, a fundamental question of nuclear physics is what happens to chiral nuclear matter as it is compressed or heated. At very high density and temperature, quarks and gluons come into play and a transition is expected to happen from a phase of nuclear matter consisting of confined hadrons and mesons to a state of ‘liberated’ quarks and gluons. In this paper, we investigate the hadron-quark (HQ) phase transition occurs beyond the chiral phase transition in the nuclear matter. The results show that there exits a quarkyonic-like phase, appeared just before deconfinement, when the chiral symmetry is restored but the elementary excitation modes are still nucleonic. Keywords: nuclear matter, equations of state of nuclear matter, chiral symmetries, bag model, quark-gluon plasma, quark deconfinement, equilibrium properties near critical points, phase transitions and critical phenomena. Classification numbers: , , , , , , , . I. INTRODUCTION Recently, the mechanism of the hadron-quark (HQ) deconfinement is one of hot topics in modern physics. The confinement mechanism is a intrinsic property of quantum chromodynamics (QCD). It is an effect of asymptotically free theory [1], . as the exchanged momentum increases or as the mutual distance decreases, interactions between quarks and gluons become weaker. It means, at very high .
