TY  - INPR
A1  - Papazoglou, Panajotis
A1  - Schaffner, Jürgen
A1  - Schramm, Stefan
A1  - Zschiesche, Detlef
A1  - Stöcker, Horst
A1  - Greiner, Walter
T1  - Phase transition in the chiral sigma-omega model with dilatons
N2  - We investigate the properties of di erent modifications to the linear -model (including a dilaton field associated with broken scale invariance) at finite baryon density and nonzero temperature T. The explicit breaking of chiral symmetry and the way the vector meson mass is generated are significant for the appearance of a phase of nearly vanishing nucleon mass besides the solution describing normal nuclear matter. The elimination of the abnormal solution prohibits the onset of a chiral phase transition but allows to lower the compressibility to a reasonable range. The repulsive contributions from the vector mesons are responsible for the wide range of stability of the normal phase in the (µ, T)-plane. The abnormal solution becomes not only energet- ically preferable to the normal state at high temperature or density, but also mechanically stable due to the inclusion of dilatons. PACS number:12.39.F
KW  - Quanten-Chromodynamik
KW  - QCD
KW  - Kernmaterie
KW  - QCD
KW  - Quantum chromodynamics
KW  - nuclear matter
Y1  - 2006
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/3002
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-24004
ER  -