出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We analyze the spectral properties of the quark propagator above the critical temperature for the
deconfinement phase transition in quenched lattice QCD using clover improvedWilson fermions.
The bare quark mass dependence of the quark spectral function is analyzed by varying the hopping
parameter k in Landau gauge. We assume a two-pole structure for the quark spectral function,
which is numerically found to work quite well for any value of k. It is shown that in the chiral
limit the quark spectral function has two collective modes that correspond to the normal and
plasmino excitations, while it is dominated by a single-pole structure when the bare quark mass
becomes large.
