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Critical endpoint in the Polyakov-loop extended NJL model

Authors
Journal
Physics Letters B
0370-2693
Publisher
Elsevier
Publication Date
Volume
662
Issue
1
Identifiers
DOI: 10.1016/j.physletb.2008.01.075
Keywords
  • Phenomenology
Disciplines
  • Chemistry
  • Physics

Abstract

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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