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

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 rati...

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Detalles Bibliográficos
Autores principales: Bluhm, M., Alba, P., Alberico, W., Beraudo, A., Ratti, C.
Lenguaje:eng
Publicado: 2013
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/j.nuclphysa.2014.06.013
http://cds.cern.ch/record/1558250
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author Bluhm, M.
Alba, P.
Alberico, W.
Beraudo, A.
Ratti, C.
author_facet Bluhm, M.
Alba, P.
Alberico, W.
Beraudo, A.
Ratti, C.
author_sort Bluhm, M.
collection CERN
description 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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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2013
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spelling cern-15582502022-08-10T20:40:50Zdoi:10.1016/j.nuclphysa.2014.06.013http://cds.cern.ch/record/1558250engBluhm, M.Alba, P.Alberico, W.Beraudo, A.Ratti, C.Lattice QCD-based equations of state at vanishing net-baryon densityParticle Physics - PhenomenologyWe 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.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.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.arXiv:1306.6188oai:cds.cern.ch:15582502013-06-26
spellingShingle Particle Physics - Phenomenology
Bluhm, M.
Alba, P.
Alberico, W.
Beraudo, A.
Ratti, C.
Lattice QCD-based equations of state at vanishing net-baryon density
title Lattice QCD-based equations of state at vanishing net-baryon density
title_full Lattice QCD-based equations of state at vanishing net-baryon density
title_fullStr Lattice QCD-based equations of state at vanishing net-baryon density
title_full_unstemmed Lattice QCD-based equations of state at vanishing net-baryon density
title_short Lattice QCD-based equations of state at vanishing net-baryon density
title_sort lattice qcd-based equations of state at vanishing net-baryon density
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/j.nuclphysa.2014.06.013
http://cds.cern.ch/record/1558250
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AT albap latticeqcdbasedequationsofstateatvanishingnetbaryondensity
AT albericow latticeqcdbasedequationsofstateatvanishingnetbaryondensity
AT beraudoa latticeqcdbasedequationsofstateatvanishingnetbaryondensity
AT rattic latticeqcdbasedequationsofstateatvanishingnetbaryondensity

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