Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-10-24
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 18 figures. Typos were revised. Symbols /P and /C were added in Figures 8a and 8b. Colors of the figures were change
Scientific paper
The phase structure of two-flavor QCD is investigated at real isospin and imaginary quark chemical potentials by using the Polyakov-loop extended Nambu--Jona-Lasinio model. In the region, parity symmetry is spontaneously broken by the pion superfluidity phase transition, whereas charge-conjugation symmetry is spontaneously violated by the Roberge-Weiss transition. The chiral (deconfinement) crossover at zero isospin and quark chemical potentials is a remnant of the parity (charge-conjugation) violation. The interplay between the parity and charge-conjugation violations are analyzed, and it is investigated how the interplay is related to the correlation between the chiral and deconfinement crossovers at zero isospin and quark chemical potentials.
Kishikawa Mizuho
Kouno Hiroaki
Sakai Yuji
Sasaki Takahiro
Yahiro Masanobu
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