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

Abstract

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.

Authors:
; ; ;  [1]
  1. Department of Physics, Ohio State University, Columbus, Ohio 43210-1117 (United States)
Publication Date:
OSTI Identifier:
21499202
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 82; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevC.82.054904; (c) 2010 The American Physical Society; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Chun, Shen, Heinz, Ulrich, Huovinen, Pasi, Song, Huichao, Institut fuer Theoretische Physik, Johann Wolfgang Goethe-Universitaet, Max-von-Laue-Strasse 1, D-60438 Frankfurt am Main, and Department of Physics, Ohio State University, Columbus, Ohio 43210-1117. Systematic parameter study of hadron spectra and elliptic flow from viscous hydrodynamic simulations of Au+Au collisions at {radical}(s{sub NN})=200 GeV. United States: N. p., 2010. Web. doi:10.1103/PHYSREVC.82.054904.
Chun, Shen, Heinz, Ulrich, Huovinen, Pasi, Song, Huichao, Institut fuer Theoretische Physik, Johann Wolfgang Goethe-Universitaet, Max-von-Laue-Strasse 1, D-60438 Frankfurt am Main, & Department of Physics, Ohio State University, Columbus, Ohio 43210-1117. Systematic parameter study of hadron spectra and elliptic flow from viscous hydrodynamic simulations of Au+Au collisions at {radical}(s{sub NN})=200 GeV. United States. doi:10.1103/PHYSREVC.82.054904.
Chun, Shen, Heinz, Ulrich, Huovinen, Pasi, Song, Huichao, Institut fuer Theoretische Physik, Johann Wolfgang Goethe-Universitaet, Max-von-Laue-Strasse 1, D-60438 Frankfurt am Main, and Department of Physics, Ohio State University, Columbus, Ohio 43210-1117. Mon . "Systematic parameter study of hadron spectra and elliptic flow from viscous hydrodynamic simulations of Au+Au collisions at {radical}(s{sub NN})=200 GeV". United States. doi:10.1103/PHYSREVC.82.054904.
@article{osti_21499202,
title = {Systematic parameter study of hadron spectra and elliptic flow from viscous hydrodynamic simulations of Au+Au collisions at {radical}(s{sub NN})=200 GeV},
author = {Chun, Shen and Heinz, Ulrich and Huovinen, Pasi and Song, Huichao and Institut fuer Theoretische Physik, Johann Wolfgang Goethe-Universitaet, Max-von-Laue-Strasse 1, D-60438 Frankfurt am Main and Department of Physics, Ohio State University, Columbus, Ohio 43210-1117},
abstractNote = {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.},
doi = {10.1103/PHYSREVC.82.054904},
journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 5,
volume = 82,
place = {United States},
year = {2010},
month = {11}
}