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

C. Bernard, T. Burch, C. DeTar, Steven Gottlieb, L. Levkova, U. M. Heller, J. E. Hetrick, R. Sugar, D. Toussaint

Research output: Contribution to journalArticlepeer-review

99 Scopus citations


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(a2) improved staggered quark action for lattices with temporal extent Nt=4 and 6. The heavy quark mass ms is fixed at approximately the physical strange quark mass and the two degenerate light quarks have masses mud 0.1ms or 0.2ms. The calculation of the thermodynamic observables employs the integral method where energy density and pressure are obtained by integration over the interaction measure.

Original languageEnglish (US)
Article number094505
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number9
StatePublished - May 31 2007
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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