Quark Spectrum near Chiral Transition Points

Abstract

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.

9 pages, 20 eps figures. To appear in the proceedings of "International Workshop on Dynamical Symmetry Breaking" (DSB 2004), Nagoya University, December 21-22, 2004

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