点击次数：

论文类型：期刊论文

发表时间：2020-03-26

发表刊物：PHYSICAL REVIEW D

收录刊物：SCIE

卷号：101

期号：5

ISSN号：2470-0010

摘要：The effective restoration of the U-A(1) symmetry is revisited by implementing the functional renormalization group approach combined with the 2 + 1 flavor Polyakov-loop quark-meson model. A temperature-dependent 't Hooft term is taken to imitate the restoration of the U-A(1) symmetry. Order parameters, meson spectrum and mixing angles, especially the pressure, the entropy density, and the speed of sound of the system arc calculated to explore the effects of different U-A(1) symmetry restoration patterns. We show then that the temperature for the restoration of the U-A(1) symmetry is much higher than that for the chiral symmetry SUA(3).