Quasiparticle Picture of Quarks near Chiral Phase Transition

Details Quasiparticle Picture of Quarks near Chiral Phase Transition Quasiparticle Picture of Quarks near Chiral Phase Transition

2005-10-28

arxiv.org/abs/hep-ph/0510381v1

Acta Phys.Hung. A27 (2006) 343-346

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 5 eps figures, to appear in the proceedings of 18th International Conference on Ultrarelativistic Nucleus-Nucleus Col

Scientific paper

10.1556/APH.27.2006.2-3.36

We study how the quasiparticle picture of the quark can be modified near but above the critical tempearture (Tc) of the chiral phase transition; we incorporate into the quark self-energy the effects of the precursory soft modes of the phase transition, i.e., `para-\sigma(\pi) meson'. It is found that the quark spectrum has a three-peak structure near Tc: We show that the additional new spectra originate from the mixing between a quark (anti-quark) and an anti-quark hole (quark hole) caused by a ``resonant scattering'' of the quasi-fermions with the thermally-excited soft modes.

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