Quark Spectrum near Chiral Transition Points
  Near the critical temperature of the chiral phase transition, a collective excitation due to fluctuation of the chiral order parameter appears. We investigate how it affects the quark spectrum near but above the critical temperature. The calculated spectral function has many peaks. We show this behavior can be understood in terms of resonance scatterings of a quark off the collective mode. 
Masakiyo Kitazawa, Teiji Kunihiro, Yukio Nemoto