QCD equation of state with 2+1 flavors of improved staggered quarks

Journal Article · Tue May 01 04:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.75.094505· OSTI ID:21020500

Bernard, C; Burch, T; DeTar, C; Gottlieb, Steven; Levkova, L; Heller, U M; Hetrick, J E; Sugar, R; Toussaint, D ^[1]

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1. Department of Physics, Washington University, St. Louis, Missouri 63130 (United States)

We report results for the interaction measure, pressure, and energy density for nonzero-temperature QCD with 2+1 flavors of improved staggered quarks. In our simulations, we use a Symanzik improved gauge action and the Asqtad O(a{sup 2}) improved staggered quark action for lattices with temporal extent N{sub t}=4 and 6. The heavy quark mass m{sub s} is fixed at approximately the physical strange quark mass and the two degenerate light quarks have masses m{sub ud}{approx_equal}0.1m{sub s} or 0.2m{sub s}. The calculation of the thermodynamic observables employs the integral method where energy density and pressure are obtained by integration over the interaction measure.

• OSTI ID: 21020500
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 75; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B QUARKS
C QUARKS
COMPUTERIZED SIMULATION
D QUARKS
ENERGY DENSITY
EQUATIONS OF STATE
FLAVOR MODEL
QUANTUM CHROMODYNAMICS
REST MASS
S QUARKS
T QUARKS
U QUARKS