Dual quark condensate in the Polyakov-loop extended Nambu--Jona-Lasinio model

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

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4 pages, 5 figures, 1 table, version accepted for publication in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.80.117901

The dual quark condensate $\Sigma^{(n)}$ proposed recently as a new order parameter of the spontaneous breaking of the ${\mathbb Z}_3$ symmetry are evaluated by the Polyakov-loop extended Nambu--Jona-Lasinio model, where $n$ are winding numbers. The Polyakov-loop extended Nambu--Jona-Lasinio model well reproduces lattice QCD data on $\Sigma^{(1)}$ measured very lately. The dual quark condensate $\Sigma^{(n)}$ at higher temperatures is sensitive to the strength of the vector-type four-quark interaction in the Polyakov-loop extended Nambu--Jona-Lasinio model and hence a good quantity to determine the strength.

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