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

Kouji Kashiwa, Hiroaki Kouno, Tomohiko Sakaguchi, Masayuki Matsuzaki, Masanobu Yahiro

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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.

Original languageEnglish
Pages (from-to)446-451
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number5-6
Publication statusPublished - Apr 19 2007


All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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