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

Journal Article · Tue Mar 15 04:00:00 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, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 83; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

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