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arXiv · 0905.3099

Hydrodynamics with a chiral hadronic equation of state including quark degrees of freedom

J. Steinheimer·V. Dexheimer·H. Petersen·M. Bleicher·S. Schramm·H. Stoecker
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Abstract

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.

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J. Steinheimer, V. Dexheimer, H. Petersen, M. Bleicher, S. Schramm, H. Stoecker. 2010-04-30. Hydrodynamics with a chiral hadronic equation of state including quark degrees of freedom. https://doi.org/10.1103/physrevc.81.044913

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