Chiral phase transition in an extended NJL model with higher-order multi-quark interactions

Details Chiral phase transition in an extended NJL model with higher-order multi-quark interactions Chiral phase transition in an extended NJL model with higher-order multi-quark interactions

2006-08-31

arxiv.org/abs/nucl-th/0608078v1

Phys.Lett.B647:446-451,2007

Physics

Nuclear Physics

Nuclear Theory

11pages, 7 figures

Scientific paper

10.1016/j.physletb.2007.01.061

The chiral phase transition is studied in an extended Nambu--Jona-Lasinio model with eight-quark interactions. Equations for scalar and vector quark densities, derived in the mean field approximation, are nonlinear and mutually coupled. The scalar-type nonlinear term hastens the restoration of chiral symmetry, while the scalar-vector mixing term makes the transition sharper. The scalar-type nonlinear term shifts the critical endpoint toward the values predicted by lattice QCD simulations and the QCD-like theory.

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