The HotQCD Equation of State

Journal Article · Thu Aug 13 00:00:00 EDT 2009 · Nuclear Physics A, vol. 830, no. 1-4, October 10, 2009, pp. 725c-728c

DOI:https://doi.org/10.1016/j.nuclphysa.2009.09.061· OSTI ID:970153

Soltz, R A

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{sup 3} x 8 with m{sub l} = 0.1 m{sub s} (corresponding to a pion mass of {approx}220 MeV) using two improved staggered fermion actions, p4 and asqtad. Calculations were performed along lines of constant physics using more than 100M cpu-hours on BG/L supercomputers at LLNL, NYBlue, and SDSC. We present parameterizations of the equation of state suitable for input into hydrodynamics models of heavy ion collisions.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 970153
• Report Number(s): LLNL-JRNL-416214; TRN: US1001000
• Journal Information: Nuclear Physics A, vol. 830, no. 1-4, October 10, 2009, pp. 725c-728c, Vol. 830, Issue 1-4
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUMM MECHANICS
GENERAL PHYSICS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
DIMENSIONS
FERMIONS
HEAVY IONS
HYDRODYNAMICS
LAWRENCE LIVERMORE NATIONAL LABORATORY
PHYSICS
PIONS
QUANTUM CHROMODYNAMICS
SIMULATION
SUPERCOMPUTERS