Spectral properties of quarks above T_c in quenched lattice QCD

Details Spectral properties of quarks above T_c in quenched lattice QCD Spectral properties of quarks above T_c in quenched lattice QCD

2007-08-02

arxiv.org/abs/0708.0299v2

Phys.Lett.B658:45-49,2007

Physics

High Energy Physics

High Energy Physics - Lattice

5 pages, 3 figures, typos corrected, references added

Scientific paper

10.1016/j.physletb.2007.10.034

We analyze the quark spectral function above the critical temperature for deconfinement in quenched lattice QCD using clover improved Wilson fermions in Landau gauge. We show that the temporal quark correlator is well reproduced by a two-pole approximation for the spectral function and analyze the bare quark mass dependence of both poles as well as their residues. In the chiral limit we find that the quark spectral function has two collective modes which correspond to the normal and plasmino excitations. At large values of the bare quark mass the spectral function is dominated by a single pole.

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