Title of Paper:New insight about the effective restoration of U-A(1) symmetry

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Date of Publication:2020-03-26

Journal:PHYSICAL REVIEW D

Included Journals:SCIE

Volume:101

Issue:5

ISSN No.:2470-0010

Abstract: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).