### Session FF: Mini-Symposium: Viscosity, String Theory and Hydrodynamics

8:30 AM–10:30 AM, Saturday, October 25, 2008
Room: Simmons Ballroom 4

Chair: W.A. Zajc, Columbia University

Abstract ID: BAPS.2008.DNP.FF.3

### Abstract: FF.00003 : The Lattice QCD Equation of State and Implications for Hydrodynamic Modeling of Heavy Ion Collisions

9:18 AM–9:30 AM

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#### Author:

Ron Soltz
(Lawrence Livermore National Lab)

We present results for the QCD Equation of State of at zero baryon density calculated on a lattice of dimensions $32^3 \times 8$ with $m_l = 0.1 m_s$ using two improved staggered fermion actions, p4 and asqtad. Calculations were performed along lines of constant physics with a pion mass of approximately 200~MeV, and were carried out using more than 100M cpu-hours on BG/L supercomputers at LLNL, BNL, and UCSD. Both calculations are consistent with a cross-over transition in the range 185 -- 195~MeV/c. Recent results from the lattice will be compared to those currently used as input to hydrodynamic models. Consequences for calculations of observables such as spectra, flow, and space-time measurements in heavy ion collisions will be discussed.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2008.DNP.FF.3