Thursday, June 27, 2013

1306.6188 (M. Bluhm et al.)

Lattice QCD-based equations of state at vanishing net-baryon density    [PDF]

M. Bluhm, P. Alba, W. Alberico, A. Beraudo, C. Ratti
We construct a realistic equation of state for QCD matter at vanishing net-baryon density, which is based on recent lattice QCD results at high temperatures combined with a hadron resonance gas model in the low-temperature, confined phase. Partial chemical equilibrium, in which certain particle ratios are fixed at the chemical freeze-out, can be implemented, allowing a description closer to the experimental situation. Given the present uncertainty in the chemical freeze-out temperature, we consider different values within the expected range. The resulting equations of state can be applied in the hydrodynamic modeling of relativistic heavy-ion collisions at the LHC and at the highest RHIC beam energies. Suitable parametrizations of our results are provided.
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