Critical endpoint in the Polyakov-loop extended NJL model

Details Critical endpoint in the Polyakov-loop extended NJL model Critical endpoint in the Polyakov-loop extended NJL model

2007-10-11

arxiv.org/abs/0710.2180v2

Phys.Lett.B662:26-32,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 6 figures embedded, accepted for publication in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2008.01.075

The critical endpoint (CEP) and the phase structure are studied in the Polyakov-loop extended Nambu--Jona-Lasinio model in which the scalar type eight-quark (\sigma^4) interaction and the vector type four-quark interaction are newly added. The \sigma^4 interaction largely shifts the CEP toward higher temperature and lower chemical potential, while the vector type interaction does oppositely. At zero chemical potential, the \sigma^4 interaction moves the pseudo-critical temperature of the chiral phase transition to the vicinity of that of the deconfinement phase transition.

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