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Causal Viscous Hydrodynamics for Central Heavy-Ion Collisions

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arxiv nucl-th/0610108 v2 pith:H5YBTC3P submitted 2006-10-26 nucl-th hep-ph

Rudolf Baier , Paul Romatschke This is my paper · ORCID
classification nucl-thhep-ph
keywords centralcollisionsheavy-ionviscousalgorithmcausaleffectshydrodynamic
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We study causal viscous hydrodynamics in the context of central relativistic heavy-ion collisions and provide details of a straightforward numerical algorithm to solve the hydrodynamic equations. It is shown that correlation functions of fluctuations provide stringent test cases for any such numerical algorithm. Passing these tests, we study the effects of viscosity on the temperature profile in central heavy-ion collisions. Also, we find that it is possible to counter-act the effects of viscosity to some extent by re-adjusting the initial conditions. However, viscous corrections are strongest for high-mass particles, signaling the breakdown of hydrodynamic descriptions for large eta/s.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Hydro+ in Action: Understanding the Out-of-Equilibrium Dynamics Near a Critical Point in the QCD Phase Diagram

    hep-ph 2019-08 conditional novelty 6.0 of 10

    First numerical implementation of Hydro+ in an expanding fireball shows critical fluctuations lag behind equilibrium, advect outward, and feed back only mildly on the bulk flow in this simplified model.

  2. Normalized symmetric cumulants as a measure of QCD phase transition: a viscous hydrodynamic study

    hep-ph 2019-08 conditional novelty 6.0 of 10

    A viscous hydrodynamic study shows that normalized symmetric cumulants of flow harmonics can discriminate a crossover QCD equation of state from a first-order one at 62.4 GeV Au+Au collisions.

  3. Relativistic Dispersion Spectra across Lorentz boosted frames: Spurious modes and the enigma of causality

    hep-th 2025-12 conditional novelty 5.0 of 10

    Rest-frame dispersion modes can be mapped into Lorentz-boosted frames through a parametric re-parametrization; the boost-generated 'spurious' roots appear exactly when the mode count is not conserved, which the author...

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