Spectral properties of quarks above Tc -- thermal mass, dispersion relation, and self-energy --
arXiv:1011.2822
Abstract
Spectral properties of quarks above the critical temperature for deconfinement are analyzed in quenched lattice QCD on lattices of size 128^3x16. We study quark spectral function in energy and momentum space, focusing on the values of the thermal mass and the dispersion relations of normal and plasmino modes at nonzero momentum, as well as their spatial volume dependence. Our numerical result suggests that the dispersion relation of the plasmino mode has a minimum at nonzero momentum even near the critical temperature. The quark self-energy is also analyzed by using the analyticy of the inverse propagator, which is found to be consistent with the spectral function estimated by the two-pole ansatz.
arXiv comment7 pages, 3 figures, talk presented at the XXVIII International Symposium on Lattice Field Theory June 14-19, 2010, Villasimius, Sardinia Italy
References in corpus (5)
- Quark propagator at finite temperature and finite momentum in quenched lattice QCD
- Quark Spectrum above but near Critical Temperature of Chiral Transition
- Novel Collective Excitations and the Quasi-Particle Picture of Quarks Coupled with a Massive Boson at Finite Temperature
- Spectral properties of quarks above T_c in quenched lattice QCD
- Spectral properties of massless and massive quarks coupled with massive boson at finite temperature