The HotQCD Equation of State

Details The HotQCD Equation of State The HotQCD Equation of State

2009-08-13

arxiv.org/abs/0908.1951v2

Nucl.Phys.A830:725c-728c,2009

Physics

High Energy Physics

High Energy Physics - Lattice

4 pages, 5 figures - to appear in the conference proceedings for Quark Matter 2009, March 30 - April 4, Knoxville, Tennessee

Scientific paper

10.1016/j.nuclphysa.2009.09.061

We present results from recent calculations of the QCD equation of state by the HotQCD Collaboration and review the implications for hydrodynamic modeling. The equation of state of QCD at zero baryon density was calculated on a lattice of dimensions $32^3 \times 8$ with $m_l = 0.1 m_s$ (corresponding to a pion mass of $\sim$220 MeV) using two improved staggered fermion actions, p4 and asqtad. C alculations were performed along lines of constant physics using more than 100M cpu-hours on BG/L supercomputers at LLNL, NYBlue, and SDSC. We present paramete rizations of the equation of state suitable for input into hydrodynamics models of heavy ion collisions.

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