Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-05-02
Physics Letters B 705 (2011) 349-355
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages, 6 figures
Scientific paper
10.1016/j.physletb.2011.10.032
Theta vacuum effects on the QCD phase structure in the \mu-T plane are studied by using the Polyakov-loop extended Nambu-Jona-Lasinio model and its extension, where \mu is the quark chemical potential and T is temperature, respectively. As the parameter \theta of the theta vacuum increases, the chiral transition becomes stronger. For large \theta, it eventually becomes first order even at zero \mu.
Kouno Hiroaki
Sakai Yuji
Sasaki Takahiro
Yahiro Masanobu
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