TY - JOUR
T1 - The QCD EoS from simulations on BlueGene L Supercomputers at LLNL and NYBlue
AU - HotQCD Collaboration
AU - Gupta, Rajan
AU - Bazavov, Alexei
AU - Bhattacharya, Tanmoy
AU - Cheng, Michael
AU - Christ, Norman
AU - DeTar, Carleton
AU - Gottlieb, Steven
AU - Gupta, Rajan
AU - Heller, Urs
AU - Huebner, Kay
AU - Jung, Chulwoo
AU - Karsch, Frithjof
AU - Laermann, Edwin
AU - Levkova, Ludmila
AU - Luu, Thomas
AU - Mawhinney, Robert
AU - Petreczky, Peter
AU - Renfrew, Dwight
AU - Schmidt, Christian
AU - Soltz, Ron
AU - Soeldner, Wolfgang
AU - Sugar, Robert
AU - Toussaint, Doug
AU - Vranas, Pavlos
N1 - Funding Information:
We are grateful to LLNL, NNSA, and New York Center for Computational Science for providing access to the Bluegene/L supercomputers. This work is supported by US DOE and NSF.
Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.
PY - 2008
Y1 - 2008
N2 - We present results for the QCD Equation of State (EoS) obtained using simulations of lattice QCD at zero chemical potential. Our high statistics results compare improved asqtad and p4fat3 staggered quarks on lattices with a temporal extent Nτ = 6 and 8 and light quark masses approximately one fifth and one tenth the strange quark mass. We find that the two actions give consistent results and estimate that the trace anomaly (ε−3p)/T4 obtained on Nτ = 8 lattices represents the continuum value to better than 20% uncertainty over the temperature range 140−700 MeV. The precision in the estimates of energy density and pressure are better, therefore, we conclude that lattice estimates of the energy density and pressure should be used in the phenomenological analysis of RHIC and LHC data. We also find a consistent picture of the crossover temperature from all observables studied, with the best estimated range to be 185−195 MeV. These calculations are being carried out on the IBM BlueGene/L supercomputer at Lawrence Livermore National Laboratory and at the New York Center for Computational Science (NYBlue).
AB - We present results for the QCD Equation of State (EoS) obtained using simulations of lattice QCD at zero chemical potential. Our high statistics results compare improved asqtad and p4fat3 staggered quarks on lattices with a temporal extent Nτ = 6 and 8 and light quark masses approximately one fifth and one tenth the strange quark mass. We find that the two actions give consistent results and estimate that the trace anomaly (ε−3p)/T4 obtained on Nτ = 8 lattices represents the continuum value to better than 20% uncertainty over the temperature range 140−700 MeV. The precision in the estimates of energy density and pressure are better, therefore, we conclude that lattice estimates of the energy density and pressure should be used in the phenomenological analysis of RHIC and LHC data. We also find a consistent picture of the crossover temperature from all observables studied, with the best estimated range to be 185−195 MeV. These calculations are being carried out on the IBM BlueGene/L supercomputer at Lawrence Livermore National Laboratory and at the New York Center for Computational Science (NYBlue).
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M3 - Conference article
AN - SCOPUS:85055324228
SN - 1824-8039
VL - 66
JO - Proceedings of Science
JF - Proceedings of Science
T2 - 26th International Symposium on Lattice Field Theory, LATTICE 2008
Y2 - 14 July 2008 through 19 July 2008
ER -