QCD thermodynamics with three flavors of improved staggered quarks

C. Bernard, T. Burch, C. DeTar, J. Osborn, Steven Gottlieb, E. B. Gregory, William D Toussaint, U. M. Heller, R. Sugar

Research output: Contribution to journalArticle

214 Citations (Scopus)

Abstract

We report on a study of QCD thermodynamics with three flavors of quarks, using a Symanzik improved gauge action and the Asqtad O(a<sup>2</sup>) improved staggered quark action. Simulations were carried out with lattice spacings 1/4T, 1/6T, and 1/8T both for three degenerate quarks with masses less than or equal to the strange quark mass m<inf>s</inf> and for degenerate up and down quarks with masses in the range 0.1m<inf>s</inf> ≤ m<inf>u,d</inf> ≤ 0.6m <inf>s</inf> and the strange quark mass fixed near its physical value. We present results for standard thermodynamics quantities, such as the Polyakov loop, the chiral order parameter and its susceptibility. For the quark masses studied to date we find a rapid crossover rather than a bona fide phase transition. We have carried out the first calculations of quark number susceptibilities with three flavors of sea quarks. These quantities are of physical interest because they are related to event-by-event fluctuations in heavy ion collision experiments. Comparison of susceptibilities at different lattice spacings show that our results are close to the continuum values.

Original languageEnglish (US)
Article number034504
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume71
Issue number3
DOIs
StatePublished - 2005

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Quarks
Thermodynamics
quantum chromodynamics
quarks
thermodynamics
Susceptibility
magnetic permeability
Spacing
spacing
Heavy-ion Collisions
Less than or equal to
ionic collisions
Order Parameter
Crossover
crossovers
Gauge
Continuum
Phase Transition
Fluctuations
continuums

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics
  • Mathematical Physics

Cite this

Bernard, C., Burch, T., DeTar, C., Osborn, J., Gottlieb, S., Gregory, E. B., ... Sugar, R. (2005). QCD thermodynamics with three flavors of improved staggered quarks. Physical Review D - Particles, Fields, Gravitation and Cosmology, 71(3), [034504]. https://doi.org/10.1103/PhysRevD.71.034504

QCD thermodynamics with three flavors of improved staggered quarks. / Bernard, C.; Burch, T.; DeTar, C.; Osborn, J.; Gottlieb, Steven; Gregory, E. B.; Toussaint, William D; Heller, U. M.; Sugar, R.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 71, No. 3, 034504, 2005.

Research output: Contribution to journalArticle

Bernard, C, Burch, T, DeTar, C, Osborn, J, Gottlieb, S, Gregory, EB, Toussaint, WD, Heller, UM & Sugar, R 2005, 'QCD thermodynamics with three flavors of improved staggered quarks', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 71, no. 3, 034504. https://doi.org/10.1103/PhysRevD.71.034504
Bernard, C. ; Burch, T. ; DeTar, C. ; Osborn, J. ; Gottlieb, Steven ; Gregory, E. B. ; Toussaint, William D ; Heller, U. M. ; Sugar, R. / QCD thermodynamics with three flavors of improved staggered quarks. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2005 ; Vol. 71, No. 3.
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