Three-flavor chiral phase structure in hot and dense QCD matter
- Institut fuer Physik, Karl-Franzens-Universitaet, A-8010 Graz (Austria)
- Institut fuer Kernphysik, TU Darmstadt, D-64289 Darmstadt (Germany)
Chiral symmetry restoration at nonzero temperature and quark densities are investigated in the framework of a linear sigma model with N{sub f}=3 light quark flavors. After the derivation of the grand potential in mean-field approximation, the nonstrange and strange condensates, the in-medium masses of the scalar and pseudoscalar nonets are analyzed in hot and dense medium. The influence of the axial anomaly on the nonet masses and the isoscalar mixings on the pseudoscalar {eta}-{eta}{sup '} and scalar {sigma}(600)-f{sub 0}(1370) complex are examined. The sensitivity of the chiral phase transition as well as the existence and location of a critical end point in the phase diagram on the value of the sigma mass are explored. The chiral critical surface with and without the influence of the axial U(1){sub A} anomaly is elaborated as a function of the pion and kaon masses for several values of the sigma mass.
- OSTI ID:
- 21254701
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 79, Issue 1; Other Information: DOI: 10.1103/PhysRevD.79.014018; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Light scalar mesons in the improved ladder QCD
Mass uncertainties of f{sub 0}(600) and f{sub 0}(1370) and their effects on determination of the quark and glueball admixtures of the I=0 scalar mesons