Behavior of the topological susceptibility at finite T and $\mu$ and   signs of restoration of chiral symmetries
  We investigate the possible restoration of chiral and axial symmetries across the phase transition at finite temperature and chemical potential, by analyzing the behavior of several physics quantities, such as the quark condensates and the topological susceptibility, the respective derivatives in order to chemical potential, and the masses of meson chiral partners. We discuss whether only chiral symmetry or both chiral and axial symmetries are restored and what is the role of the strange quark. The results are compared with recent lattice results. 
M. C. Ruivo, Pedro Costa, C. A. de Sousa