Zs. Szep

Critical surface of the SU(3)L×SU(3)R chiral quark model at nonzero baryon density

The boundary of the first order chiral phase transition region is studied in the m{sub {pi}}-m{sub K}-{mu}{sub B} space using the one-loop optimized perturbation theory for the resummation of the perturbative series. Chiral perturbation theory for mesons and baryons is used for the T=0 parametrization of the model. The surface of second order transition points bends with increasing {mu}{sub B} towards the physical point of the m{sub {pi}}-m{sub K} mass plane allowing for the existence of the critical end point in the {mu}{sub B}-T plane at the physical point. The location and scaling region of the CEP is explored.

Mapping the boundary of the first order finite temperature restoration of chiral symmetry in the (mπ-mK)-plane with a linear sigma model

The phase diagram of the three-flavor QCD is mapped out in the low mass corner of the (

Renormalisability of the 2PI-Hartree approximation of multicomponent scalar models in the broken symmetry phase

{m}_{ensuremath{pi}}ensuremath{-}{m}_{K}

Influence of the Polyakov loop on the chiral phase transition in the two flavor chiral quark model

)-plane with help of the

Influence of the isospin and hypercharge chemical potentials on the location of the critical end point in the μb-T phase diagram of the SU(3)L x SU(3)R chiral quark model

S{U}_{L}(3)ifmmodetimeselsetexttimesfi{}S{U}_{R}(3)

Counterterm resummation for 2PI-approximation in constant background

linear sigma model (

Resummed one-loop determination of the phase boundary of the SU(3)R×SU(3)L linear sigma model in the (mπ-mK) plane

Lensuremath{sigma}M

Second sheet σ pole and the threshold enhancement of the spectral function in the scalar-isoscalar meson sector

). A novel zero temperature parametrization is proposed for the mass dependence of the couplings away from the physical point based on the three-flavor chiral perturbation theory (U(3) ChPT). One-loop thermodynamics is constructed by applying optimized perturbation theory. The unknown dependence of the scalar spectra on the pseudoscalar masses limits the accuracy of the predictions. Results are compared to lattice data and similar investigations with other variants of effective chiral models. The critical value of the pion mass is below 65 MeV for all

Fate of the classical false vacuum

{m}_{K}

T-μ phase diagram of the chiral quark model from a large flavor number expansion

values