Finite-Temperature Phase Structure of Lattice QCD with the Wilson Quark   Action for Two and Four Flavors
  We present further analyses of the finite-temperature phase structure of lattice QCD with the Wilson quark action based on spontaneous breakdown of parity-flavor symmetry. Results are reported on (i) an explicit demonstration of spontaneous breakdown of parity-flavor symmetry beyond the critical line, (ii) phase structure and order of chiral transition for the case of $N_f=4$ flavors, and (iii) approach toward the continuum limit. 
S. Aoki, T. Kaneda, A. Ukawa, T. Umemura (University of Tsukuba)