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VOLUME 79 (2004) | ISSUE 12 | PAGE 742
On the chiral phase transition in hadronic matter
PACS: 11.30.Rd, 12.38.Aw, 25.75.Nq
Abstract
A qualitative analysis of the chiral phase transition in QCD with two massless quarks and non-zero baryon density is performed. It is assumed that at zero baryonic density, ρ=0, the temperature phase transition is of the second order. Due to a specific power dependence of baryon masses on the chiral condensate the phase transition becomes of the first order at the temperature T=T_{\mathrm{ph}}(\rho) for ρ>0. At temperatures T_{\mathrm{cont}}(\rho) > T > T_{\mathrm{ph}}(\rho) there is a mixed phase consisting of the quark phase (stable) and the hadron phase (unstable). At the temperature T = T_{\mathrm{cont}}(\rho) the system experiences a continuous transition to the pure chirally symmetric phase.