Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-05-19
Phys.Rev.C81:044913 2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
Published version
Scientific paper
10.1103/PhysRevC.81.044913
We investigate the influence of a deconfinement phase transition on the dynamics of hot and dense nuclear matter. We apply a hybrid model where an intermediate hydrodynamics stage is employed for the the hot and dense stage of a system created in head-on collisions of Pb+Pb/Au+Au at beam energies from $2-160A $GeV. The initial and final interactions are performed by a microscopic transport approach (UrQMD). An equation of state that incorporates a critical end point (CEP) in line with lattice data is used. It follows from coupling the Polyakov loop (as an order parameter for deconfinement) to a chiral hadronic $SU(3)_f$ model. In this configuration the EoS describes chiral restoration as well as the deconfinemt phase transition. We compare the results obtained in this approach to results from a non interacting hadron resonance gas, focussing on observables deemed to be sensitive to the phase transition to the quark gluon plasma.
Bleicher Marcus
Dexheimer Veronica
Petersen Holger
Schramm Stefan
Steinheimer Jan
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