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arXiv · 1306.6188

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

M. Bluhm·P. Alba·W. Alberico·A. Beraudo·C. Ratti
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Abstract

We present realistic equations of state for QCD matter at vanishing net-baryon density which embed recent lattice QCD results at high temperatures combined with a hadron resonance gas model in the low-temperature, confined phase. In the latter, we allow an implementation of partial chemical equilibrium, in which particle ratios are fixed at the chemical freeze-out, so that a description closer to the experimental situation is possible. Given the present uncertainty in the determination of the chemical freeze-out temperature from first-principle lattice QCD calculations, we consider different values within the expected range. The corresponding 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 as functions of the energy density are also provided.

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M. Bluhm, P. Alba, W. Alberico, A. Beraudo, C. Ratti. 2014-07-16. Lattice QCD-based equations of state at vanishing net-baryon density. https://doi.org/10.1016/j.nuclphysa.2014.06.013

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