Event-by-event hydrodynamics and elliptic flow from fluctuating initial states

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.034901· OSTI ID:21499512

Holopainen, H; Eskola, K J ^[1]; Niemi, H ^[2]

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1. Department of Physics, Post Office Box 35, University of Jyvaeskylae, FIN-40014 Jyvaeskylae (Finland)
2. Frankfurt Institute for Advanced Studies, Ruth-Moufang-Strasse 1, D-60438 Frankfurt am Main (Germany)

We develop a framework for event-by-event ideal hydrodynamics to study the differential elliptic flow, which is measured at different centralities in Au + Au collisions at the Relativistic Heavy Ion Collider (RHIC). Fluctuating initial energy density profiles, which here are the event-by-event analogs of the wounded nucleon profiles, are created using a Monte Carlo Glauber model. Using the same event plane method for obtaining v{sub 2} as in the data analysis, we can reproduce both the measured centrality dependence and the p{sub T} shape of charged-particle elliptic flow up to p{sub T}{approx}2 GeV. We also consider the relation of elliptic flow to the initial-state eccentricity using different reference planes and discuss the correlation between the physical event plane and the initial participant plane. Our results demonstrate that event-by-event hydrodynamics with initial-state fluctuations must be accounted for before a meaningful lower limit for viscosity can be obtained from elliptic flow data.

• OSTI ID: 21499512
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 83, Issue 3; Other Information: DOI: 10.1103/PhysRevC.83.034901; (c) 2011 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ATOM-ATOM COLLISIONS
BROOKHAVEN RHIC
CHARGED PARTICLES
COLLISIONS
CORRELATIONS
DATA ANALYSIS
ENERGY DENSITY
FLUCTUATIONS
GEV RANGE 01-10
GOLD
HYDRODYNAMICS
MONTE CARLO METHOD
NUCLEONS
SIMULATION
VISCOSITY
ACCELERATORS
ATOM COLLISIONS
BARYONS
CALCULATION METHODS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
FERMIONS
FLUID MECHANICS
GEV RANGE
HADRONS
HEAVY ION ACCELERATORS
MECHANICS
METALS
STORAGE RINGS
TRANSITION ELEMENTS
VARIATIONS