Hadron resonance gas and nonperturbative QCD vacuum at finite temperature
Abstract
We study the nonperturbative QCD vacuum with two light quarks at finite temperature in the framework of hadron resonance gas. Temperature dependence of the quark and gluon condensates in the confined phase are obtained. We demonstrate that the quark condensate and one half (chromo-electric component) of gluon condensate evaporate at the same temperature, which corresponds to the temperature of quark-hadron phase transition. Critical temperature is Tc~190 MeV when temperature shift of hadron masses is taken into account.
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