Fluctuations of the chiral condensate and quasi-particle spectra near phase transition

Details Fluctuations of the chiral condensate and quasi-particle spectra near phase transition Fluctuations of the chiral condensate and quasi-particle spectra near phase transition

2007-06-19

arxiv.org/abs/0706.2697v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 5 figures, talk given at Mini-Workshop on ``Strongly Coupled Quark-Gluon Plasma: SPS, RHIC and LHC", Nagoya, Japan,

Scientific paper

We investigate the quark spectrum near but above the critical temperature of the chiral transition, taking into account the precursory soft modes. It is found that there appear novel excitation spectra of quasi-quarks and quasi-antiquarks with a three-peak structure. By a detailed analysis on the formation of the three-peak structure using Yukawa models, it is shown that the new quark spectra originate from the mixing between a quark (anti-quark) and an antiquark hole (quark hole) caused by a resonant scattering of the quasi-quark with the soft modes which have a small but finite excitation energy with a small width near the critical temperature.

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