Speaker
Mr
Philip Rau
(Goethe University Frankfurt, Germany)
Description
With an effective hadronic chiral flavor SU(3) model we investigate properties of QCD matter for a wide range of temperatures and baryochemical potentials. With our model, including all hadronic resonances up to masses of 2.6 GeV, we show that the strengths of the resonance couplings to the attractive scalar and the repulsive vector fields have a major impact on the order and location of the chiral phase transition. Reasonable vector couplings, found by comparing model data to recent lattice QCD results, limit the phase transition to a smooth cross over and therefore rule out the possible existence of a critical end point.
Furthermore, we study fluctuations of conserved charges at the phase
transition and present related (strange) quark number fluctuations and their associated susceptibility coefficients both at zero baryochemical potential and when crossing the phase transition at different regions in the T-mu plane. We show that susceptibility ratios get significantly suppressed at non-vanishing baryochemical potentials.
Primary author
Mr
Philip Rau
(Goethe University Frankfurt, Germany)
Co-authors
Prof.
Horst Stöcker
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Germany)
Dr
Jan Steinheimer
(Lawrence Berkeley National Laboratory)
Prof.
Stefan Schramm
(FIAS Frankfurt, Germany)
