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Phase diagram in the imaginary chemical potential region and extended Z3 symmetry
- Source :
- Phys.Rev.D78:036001,2008
- Publication Year :
- 2008
-
Abstract
- Phase transitions in the imaginary chemical potential region are studied by the Polyakov loop extended Nambu-Jona-Lasinio (PNJL) model that possesses the extended Z3 symmetry. The extended Z3 invariant quantities such as the partition function, the chiral condensate and the modifed Polyakov loop have the Roberge-Weiss (RW) periodicity. There appear four types of phase transitions; deconfinement, chiral, Polykov-loop RW and chiral RW transitions. The orders of the chiral and deconfinement transitions depend on the presence or absence of current quark mass, but those of the Polykov-loop RW and chiral RW transitions do not. The scalar-type eightquark interaction newly added in the model makes the chiral transition line shift to the vicinity of the deconfiment transition line.<br />Comment: 22 pages,17 figures
Details
- Database :
- arXiv
- Journal :
- Phys.Rev.D78:036001,2008
- Publication Type :
- Report
- Accession number :
- edsarx.0803.1902
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevD.78.036001