Hadron-quark phase transition in asymmetric matter with dynamical quark masses

B.Liu; G.Y.Shao; M.Colonna; M.Di Toro; S.Plumari; V.Greco; Y.X.Liu

Hadron-quark phase transition in asymmetric matter with dynamical quark masses

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arxiv 1102.4964 v1 pith:D72FC4AU submitted 2011-02-24 nucl-th hep-phnucl-ex

Hadron-quark phase transition in asymmetric matter with dynamical quark masses

G.Y.Shao , M.Di Toro , B.Liu , M.Colonna , V.Greco , Y.X.Liu , S.Plumari This is my paper

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keywords phasequarktransitionhadron-quarkchiraldynamicalappearanceasymmetric

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The two-Equation of State (EoS) model is used to describe the hadron-quark phase transition in asymmetric matter formed at high density in heavy-ion collisions. For the quark phase, the three-flavor Nambu--Jona-Lasinio (NJL) effective theory is used to investigate the influence of dynamical quark mass effects on the phase transition. At variance to the MIT-Bag results, with fixed current quark masses, the main important effect of the chiral dynamics is the appearance of an End-Point for the coexistence zone. We show that a first order hadron-quark phase transition may take place in the region T=(50-80)MeV and \rho_B=(2-4)\rho_0, which is possible to be probed in the new planned facilities, such as FAIR at GSI-Darmstadt and NICA at JINR-Dubna. From isospin properties of the mixed phase somepossible signals are suggested. The importance of chiral symmetry and dynamical quark mass on the hadron-quark phase transition is stressed. The difficulty of an exact location of Critical-End-Point comes from its appearance in a region of competition between chiral symmetry breaking and confinement, where our knowledge of effective QCD theories is still rather uncertain.

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