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arXiv · 0710.2180

Critical endpoint in the Polyakov-loop extended NJL model

Kouji Kashiwa·Hiroaki Kouno·Masayuki Matsuzaki·Masanobu Yahiro
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Abstract

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 (σ^4) interaction and the vector type four-quark interaction are newly added. The σ^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 σ^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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Kouji Kashiwa, Hiroaki Kouno, Masayuki Matsuzaki, Masanobu Yahiro. 2008-01-09. Critical endpoint in the Polyakov-loop extended NJL model. https://doi.org/10.1016/j.physletb.2008.01.075

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