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Phase diagram in the imaginary chemical potential region and extended Z3 symmetry by Sakai, Yuji; Kashiwa, Kouji; Kouno, Hiroaki; Yahiro, Masanobu is a scholarly article available to read on EtoBox.

What is Phase diagram in the imaginary chemical potential region and extended Z3 symmetry about?

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.

Author

Sakai, Yuji; Kashiwa, Kouji; Kouno, Hiroaki; Yahiro, Masanobu

Published

2008

Language

EN