Systematic parameter study of hadron spectra and elliptic flow from viscous hydrodynamic simulations of Au+Au collisions at {radical}(s{sub NN})=200 GeV

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.054904· OSTI ID:21499202

Chun, Shen; Heinz, Ulrich; Huovinen, Pasi; Song, Huichao ^[1]

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1. Department of Physics, Ohio State University, Columbus, Ohio 43210-1117 (United States)

Using the (2+1)-dimensional viscous hydrodynamic code vish2+1[H. Song and U. Heinz, Phys. Lett. B 658, 279 (2008); H. Song and U. Heinz, Phys. Rev. C 77, 064901 (2008); H. Song, Ph. D. thesis, The Ohio State University, 2009], we present systematic studies of the dependence of pion and proton transverse-momentum spectra and their elliptic flow in 200A GeV Au+Au collisions on the parameters of the hydrodynamic model (thermalization time, initial entropy density distribution, decoupling temperature, equation of state, and specific shear viscosity {eta}/s). We identify a tension between the slope of the proton spectra, which (within hydrodynamic simulations that assume a constant shear viscosity to entropy density ratio) prefer larger {eta}/s values, and the slope of the p{sub T} dependence of charged hadron elliptic flow, which prefers smaller values of {eta}/s. Changing other model parameters does not appear to permit dissolution of this tension.

• OSTI ID: 21499202
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 5; Other Information: DOI: 10.1103/PhysRevC.82.054904; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ATOM-ATOM COLLISIONS
COLLISIONS
DECOUPLING
DISSOLUTION
DISTRIBUTION
ENTROPY
EQUATIONS OF STATE
GEV RANGE 100-1000
GOLD
HYDRODYNAMIC MODEL
PIONS
PROTON SPECTRA
PROTONS
SIMULATION
THERMALIZATION
THREE-DIMENSIONAL CALCULATIONS
TRANSVERSE MOMENTUM
ATOM COLLISIONS
BARYONS
BOSONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
EQUATIONS
FERMIONS
GEV RANGE
HADRONS
LINEAR MOMENTUM
MATHEMATICAL MODELS
MESONS
METALS
NUCLEONS
PARTICLE MODELS
PHYSICAL PROPERTIES
PSEUDOSCALAR MESONS
SLOWING-DOWN
SPECTRA
STATISTICAL MODELS
THERMODYNAMIC MODEL
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS