Continuous decoupling of dynamically expanding systems

Knoll, J.

doi:10.1016/j.nuclphysa.2009.01.079

Cited by 17 publications

(11 citation statements)

References 93 publications

(160 reference statements)

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“…[55] and further developed in Refs. [56,57]. There the particle emission occurs from a surface layer of the mean-free-path width.…”

Section: Inverse Slopes Of Mt Spectra and Mean Transverse Massesmentioning

confidence: 99%

Alternative scenarios of relativistic heavy-ion collisions. III. Transverse momentum spectra

Ivanov

2014

Phys. Rev. C

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Transverse-mass spectra, their inverse slopes and mean transverse masses in relativistic collisions of heavy nuclei are analyzed in a wide range of incident energies 2.7 GeV ≤ √ sNN ≤ 39 GeV.The analysis is performed within the three-fluid model employing three different equations of state (EoS's): a purely hadronic EoS, an EoS with the first-order phase transition and that with a smooth crossover transition into deconfined state. Calculations show that inverse slopes and mean transverse masses of all the species (with the exception of antibaryons within the hadronic scenario) exhibit the step-like behavior similar to that observed for mesons and protons in available experimental data. This step-like behavior takes place for all considered EoS's and results from the freezeout dynamics rather than is a signal of the deconfinement transition. A good reproduction of experimental inverse slopes and mean transverse masses for light species (up to proton) is achieved within all the considered scenarios. The freeze-out parameters are precisely the same as those used for reproduction of particles yields in previous papers of this series. This became possible because the freeze-out stage is not completely equilibrium.

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“…[55] and further developed in Refs. [56,57]. There the particle emission occurs from a surface layer of the mean-free-path width.…”

Section: Inverse Slopes Of Mt Spectra and Mean Transverse Massesmentioning

confidence: 99%

Alternative scenarios of relativistic heavy-ion collisions. III. Transverse momentum spectra

Ivanov

2014

Phys. Rev. C

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“…A similar analysis was e.g. done in [21] in a more ab-initio fashion, however with less realistic initial conditions and only with a schematic expansion and more phenomenologically in [22]. Thus, we focus on the last stage of a heavy ion collision event, the so called kinetic or thermal freezeout [23,24], when the hadrons stop to interact with each other and their momentum distribution does not change anymore.…”

Section: Introductionmentioning

confidence: 99%

Temperatures and chemical potentials at kinetic freeze-out in relativistic heavy ion collisions from coarse grained transport simulations

Inghirami

Hillmann

Tomášik

et al. 2020

J. Phys. G: Nucl. Part. Phys.

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Using the UrQMD/coarse graining approach we explore the kinetic freeze-out stage in central Au + Au collisions at various energies. These studies allow us to obtain detailed information on the thermodynamic properties (e.g. temperature and chemical potential) of the system during the kinetic decoupling stage. We explore five relevant collision energies in detail, ranging from √ sNN = 2.4 GeV (GSI-SIS) to √ sNN = 200 GeV (RHIC). By adopting a standard Hadron Resonance Gas equation of state, we determine the average temperature T and the average baryon chemical potential µB on the space-time hyper-surface of last interaction. The results highlight the nature of the kinetic freeze-out as a continuous process. This differential decoupling is an important aspect often missed when summarizing data as single points in the phase diagram as e.g. done in Blast-Wave fits. We compare the key properties of the system derived by using our approach with other models and we briefly review similarities and differences.

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“…In many studies this hyper-surface is for hadron states characterized by the so-called hadron-chemical freeze-out temperature T ch ∼ 150 − 160 MeV. In a more realistic scenario, different inelastic processes have different cross sections (possibly dependent on quark and flavor content), which results in an extended emission process of light hadrons, suggesting a more differential point of view and a sequential freeze-out of hadrons [19,[24][25][26].…”

Section: Measuring the Charm Quark Equilibration Temperaturementioning

confidence: 99%

Testing charm quark equilibration in ultrahigh-energy heavy ion collisions with fluctuations

et al. 2018

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Recent lattice QCD data on higher order susceptibilities of Charm quarks provide the opportunity to explore Charm quark equilibration in the early quark gluon plasma (QGP) phase. Here, we propose to use the lattice data on second and fourth order net Charm susceptibilities to infer the Charm quark equilibration temperature and the corresponding volume, in the early QGP stage, via a combined analysis of experimentally measured multiplicity fluctuations. Furthermore, the first perturbative results for the second and fourth order Charm quark susceptibilities and their ratio are presented.

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Continuous decoupling of dynamically expanding systems

Cited by 17 publications

References 93 publications

Alternative scenarios of relativistic heavy-ion collisions. III. Transverse momentum spectra

Alternative scenarios of relativistic heavy-ion collisions. III. Transverse momentum spectra

Temperatures and chemical potentials at kinetic freeze-out in relativistic heavy ion collisions from coarse grained transport simulations

Testing charm quark equilibration in ultrahigh-energy heavy ion collisions with fluctuations

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