Importance of Granular Structure in the Initial Conditions for the Elliptic Flow

2008/04/30 by R. P. G. Andrade, F. Grassi, Y. Hama +3 · 3 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Elliptic flow #Flow (mathematics) #High-Energy Particle Collisions Research #Mechanics #Nuclear physics #Nucleus #Observable #Particle physics theoretical and experimental studies #Physics #Production (economics) #Quantum mechanics #hep-ph

paper · pdf · doi:10.1103/physrevlett.101.112301

published as Phys.Rev.Lett.101:112301,2008 · 4 pages, 5 figures

arxiv created 2008/04/30 · openalex publication_date 2008/09/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We show the effects of the granular structure of the initial conditions of a hydrodynamic description of high-energy nucleus-nucleus collisions on some observables, especially on the elliptic-flow parameter v2. Such a structure enhances production of isotropically distributed high-pT particles, making v2 smaller there. Also, it reduces v2 in the forward and backward regions where the global matter density is smaller and, therefore, where such effects become more efficacious.

Citations

• NeXSPheRIO results on elliptic-flow fluctuations at RHIC
• Lattice results on QCD thermodynamics
• Smoothed particle hydrodynamics for relativistic heavy-ion collisions
• Fluctuations of the Initial Conditions and the Continuous Emission in the Hydrodynamical Description of Two-Pion Interferometry
• Space-time evolution of bulk QCD matter
• A numerical approach to the testing of the fission hypothesis
• Charged hadron transverse momentum distributions in Au+Au collisions at sNN=200 GeV

Cited by

• Turbulent fluctuations around Bjorken flow
• Extensivity of irreversible current and stability in causal dissipative hydrodynamics
• Coarse-graining scale and effectiveness of hydrodynamic modeling

Related

• Elliptic Flow Based on a Relativistic Hydrodynamic Model
• The eccentricities of flow - elliptic flow fluctuations and evidence for transverse localization in the initial state of the matter in relativistic heavy ion collisions
• Saturation of elliptic flow and shear viscosity
• Elliptic flow orientation, saturation and low p_t behavior
• The importance of the initial geometry in heavy in collisions