Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Systematic parameter study of hadron spectra and elliptic flow from
  viscous hydrodynamic simulations of Au+Au collisions at sqrt(s_NN) = 200 GeV   Using the (2+1)-dimensional viscous hydrodynamic code VISH2+1, we present
systematic studies of the dependence of pion and proton transverse momentum
spectra and their elliptic flow in 200 A 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_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

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The categories of this paper are: hep-lat
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The categories of this paper are: eess
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The categories of this paper are: physics
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The categories of this paper are: solv-int
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The categories of this paper are: econ
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The categories of this paper are: astro-ph
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The categories of this paper are: math-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: stat
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The categories of this paper are: patt-sol
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The categories of this paper are: funct-an
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The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
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The categories of this paper are: chao-dyn