Causal viscous hydrodynamics for central heavy-ion collisions II: meson spectra and HBT radii

2007/01/31 by Paul Romatschke · 86 citations
Mathematics · Physics and Astronomy · #Cosmology and Gravitation Theories #Hadron #Heavy ion #Heterojunction bipolar transistor #High-Energy Particle Collisions Research #Ion #Mathematics #Meson #Multiplicity (mathematics) #Nuclear physics #Particle physics #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Spectral line #Thermodynamics #Transistor #Viscosity #hep-ph #nucl-th

paper · pdf · doi:10.1140/epjc/s10052-007-0354-z

published in The European Physical Journal C 52(1), 203-209 (Springer Science+Business Media) · 10 pages, 6 figures; v2: bug corrected, minor changes in results

arxiv created 2007/02/16 · openalex publication_date 2007/07/13 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Causal viscous hydrodynamic fits to experimental data for pion and kaon transverse momentum spectra from central Au+Au collisions at √s_NN=200 GeV are presented. Starting the hydrodynamic evolution at 1 fm/c and using small values for the relaxation time, reasonable fits up to moderate ratios η/s≃ 0.4 can be obtained. It is found that a percentage of roughly 50 η/s to 75 η/s of the final meson multiplicity is due to viscous entropy production. Finally, it is shown that with increasing viscosity, the ratio of HBT radii R_out/R_side approaches and eventually matches the experimental data.

Citations

• Effect of shear viscosity on spectra, elliptic flow, and Hanbury Brown–Twiss radii
• Thermodynamics of nonstationary and transient effects in a relativistic gas
• Freeze-Out Problem in Hydrokinetic Approach toA+ACollisions
• Nonstationary irreversible thermodynamics: A causal relativistic theory
• Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics
• Momentum broadening in an anisotropic plasma

Cited by

• Applicability of causal dissipative hydrodynamics to relativistic heavy ion collisions
• Viscous Hydrodynamic Predictions for Nuclear Collisions at the LHC
• Stability of ()-dimensional causal relativistic viscous hydrodynamics
• Simulating elliptic flow with viscous hydrodynamics
• Elliptic flow ins=200GeV Au+Au collisions ands=2.76TeV Pb+Pb collisions: Insights from viscous hydrodynamics+hadron cascade hybrid model
• Viscous evolution of the rapidity distribution of matter created in relativistic heavy-ion collisions