Quark spectrum above the critical temperature from Schwinger-Dyson equation

Details Quark spectrum above the critical temperature from Schwinger-Dyson equation Quark spectrum above the critical temperature from Schwinger-Dyson equation

2007-02-26

arxiv.org/abs/hep-ph/0702253v1

Int.J.Mod.Phys.E16:2282-2288,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 4 figures, contribution to the proceedings of the 19th International Conference on Ultra-Relativistic Nucleus-Nucleus

Scientific paper

10.1142/S0218301307007817

We investigate a spectrum of a fermion, which we call a quark, above the critical temperature of the chiral phase transition in a gauge theory using the Schwinger-Dyson (SD) equation. The SD equation enables us to study the spectrum over a wide range of the gauge coupling. It is shown that the quark spectrum has two sharp peaks which correspond to the normal quasi-quark and the plasmino and is consistent with that obtained in the hard thermal loop approximation in the weak coupling region, while it has also two peaks but with smaller thermal masses and broader widths in the strong coupling region. Temperature-dependence of the quark spectrum is also discussed.

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