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 04:00:00 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]

---

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, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 82; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

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