dorsal/arxiv
View SchemaOn the formation of Hubble flow in Little Bangs
| Authors | Mikolaj Chojnacki, Wojciech Florkowski, Tamas Csorgo |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0410036 |
| URL | https://arxiv.org/abs/nucl-th/0410036 |
| DOI | 10.1103/PhysRevC.71.044902 |
| Journal | Phys.Rev. C71 (2005) 044902 |
Abstract
A dynamical appearance of scaling solutions in the relativistic hydrodynamics applied to describe ultra-relativistic heavy-ion collisions is studied. We consider the boost-invariant cylindrically symmetric systems and the effects of the phase transition are taken into account by using a temperature dependent sound velocity inferred from the lattice simulations of QCD. We find that the transverse flow acquires the scaling form r/t within the short evolution times, 10 - 15 fm, only if the initial transverse flow originating from the pre-equilibrium collective behavior is present at the initial stage of the hydrodynamic evolution. The amount of such pre-equilibrium flow is correlated with the initial pressure gradient; larger gradients require smaller initial flow. The results of the numerical calculations support the phenomenological parameterizations used in the Blast-Wave, Buda-Lund, and Cracow models of the freeze-out process.
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"abstract": "A dynamical appearance of scaling solutions in the relativistic hydrodynamics\napplied to describe ultra-relativistic heavy-ion collisions is studied. We\nconsider the boost-invariant cylindrically symmetric systems and the effects of\nthe phase transition are taken into account by using a temperature dependent\nsound velocity inferred from the lattice simulations of QCD. We find that the\ntransverse flow acquires the scaling form r/t within the short evolution times,\n10 - 15 fm, only if the initial transverse flow originating from the\npre-equilibrium collective behavior is present at the initial stage of the\nhydrodynamic evolution. The amount of such pre-equilibrium flow is correlated\nwith the initial pressure gradient; larger gradients require smaller initial\nflow. The results of the numerical calculations support the phenomenological\nparameterizations used in the Blast-Wave, Buda-Lund, and Cracow models of the\nfreeze-out process.",
"arxiv_id": "nucl-th/0410036",
"authors": [
"Mikolaj Chojnacki",
"Wojciech Florkowski",
"Tamas Csorgo"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.71.044902",
"journal_ref": "Phys.Rev. C71 (2005) 044902",
"title": "On the formation of Hubble flow in Little Bangs",
"url": "https://arxiv.org/abs/nucl-th/0410036"
},
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