Formation of Hubble-like flow in little bangs
- Institute of Physics, Swietokrzyska Academy, PL-25406 Kielce (Poland)
The dynamical appearance of scaling solutions in relativistic hydrodynamics is studied for boost-invariant, cylindrically symmetric systems. Such solutions reproduce key qualitative features of the blast-wave, Buda-Lund, and Cracow models, which in turn fit a broad set of data measured in ultrarelativistic heavy-ion collisions. Effects of a phase transition are taken into account by using a temperature-dependent speed of sound, inferred from a lattice QCD equation of state. The transverse flow may acquire the asymptotic Hubble form r/t within short evolution times, 7-15 fm, only if an initial pre-equilibrium transverse flow is present. The precise amount of the requisite pre-equilibrium flow is anticorrelated with the initial value of the central temperature.
- OSTI ID:
- 20696091
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 71, Issue 4; Other Information: DOI: 10.1103/PhysRevC.71.044902; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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