Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-06-22
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, 4 figures, presented to Ian Kogan Memorial Volume
Scientific paper
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, $\rho=0$, 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 $\rho>0$. 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.
Chernodub Maxim N.
Ioffe Lev B.
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