Dissipative Hydrodynamics and Heavy Ion Collisions

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dc.creatorBaier, Rudolf
dc.creatorRomatschke, Paul
dc.creatorWiedemann, Urs Achim
dc.date2006-02-28
dc.date2006-03-17
dc.date.accessioned2026-07-07T10:44:49Z
dc.date.available2026-07-07T10:44:49Z
dc.descriptionRecent discussions of RHIC data emphasized the exciting possibility that the matter produced in nucleus-nucleus collisions shows properties of a near-perfect fluid. Here, we aim at delineating the applicability of fluid dynamics, which is needed to quantify the size of corresponding dissipative effects. We start from the equations for dissipative fluid dynamics, which we derive from kinetic theory up to second order (Israel-Stewart theory) in a systematic gradient expansion. In model studies, we then establish that for too early initialization of the hydrodynamic evolution ($τ_0 \lsim 1$ fm/c) or for too high transverse momentum ($p_T \gsim 1$ GeV) in the final state, the expected dissipative corrections are too large for a fluid description to be reliable. Moreover, viscosity-induced modifications of hadronic transverse momentum spectra can be accommodated to a significant degree in an ideal fluid description by modifications of the decoupling stage. We argue that these conclusions, drawn from model studies, can also be expected to arise in significantly more complex, realistic fluid dynamics simulations of heavy ion collisions.
dc.description18 pages, 5 figures, uses revtex4; v2: references added, typos corrected
dc.identifierhttps://arxiv.org/abs/hep-ph/0602249
dc.identifierhttp://arxiv.org/abs/hep-ph/0602249
dc.identifierPhys.Rev.C73:064903,2006
dc.identifierdoi:10.1103/PhysRevC.73.064903
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/182730
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Experiment
dc.subjectNuclear Theory
dc.titleDissipative Hydrodynamics and Heavy Ion Collisions
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