Is the U$_A$(1) symmetry restored at finite temperature or density?

Details Is the U$_A$(1) symmetry restored at finite temperature or density? Is the U$_A$(1) symmetry restored at finite temperature or density?

2004-11-24

arxiv.org/abs/hep-ph/0411326v1

AIP Conf.Proc. 756 (2005) 351

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, 1 figure. Talk given at 6th Conference on Quark Confinement and the Hadron Spectrum, Villasimius, Sardinia, Italy, 21

Scientific paper

10.1063/1.1920990

We investigate the full U(3)$\otimes$U(3) chiral symmetry restoration, at finite temperature and density, on the basis of the three flavor Nambu-Jona-Lasinio model with the anomaly term given by the 't Hooft interaction. We implement a temperature (density) dependence of the anomaly coefficient motivated by lattice results for the topological susceptibility. The results suggest that the axial part of the symmetry is restored before the possible restoration of the full U(3)$\otimes$U(3) chiral symmetry can occur.

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