Equation of state for two flavor QCD at Nt=6

Claude Bernard, Tom Blum, Carleton DeTar, Steven Gottlieb, Kari Rummukainen, Urs M. Heller, James E. Hetrick, William D Toussaint, Leo Kärkkäinen, R. L. Sugar, Matthew Wingate

Research output: Contribution to journalArticle

Abstract

We calculate the two flavor equation of state for QCD on lattices with lattice spacing a = (6T)-1 and find that cutoff effects are substantially reduced compared to an earlier study using a = (4T)-1. However, it is likely that significant cutoff effects remain. We fit the lattice data to expected forms of the free energy density for a second order phase transition at zero-quark mass, which allows us to extrapolate the equation of state to mq=0 and to extract the speed of sound. We find that the equation of state depends weakly on the quark mass for small quark mass.

Original languageEnglish (US)
Pages (from-to)6861-6869
Number of pages9
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume61
Issue number3
StatePublished - 2000

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equations of state
quantum chromodynamics
quarks
cut-off
flux density
free energy
spacing
acoustics

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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Bernard, C., Blum, T., DeTar, C., Gottlieb, S., Rummukainen, K., Heller, U. M., ... Wingate, M. (2000). Equation of state for two flavor QCD at Nt=6. Physical Review D - Particles, Fields, Gravitation and Cosmology, 61(3), 6861-6869.

Equation of state for two flavor QCD at Nt=6. / Bernard, Claude; Blum, Tom; DeTar, Carleton; Gottlieb, Steven; Rummukainen, Kari; Heller, Urs M.; Hetrick, James E.; Toussaint, William D; Kärkkäinen, Leo; Sugar, R. L.; Wingate, Matthew.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 61, No. 3, 2000, p. 6861-6869.

Research output: Contribution to journalArticle

Bernard, C, Blum, T, DeTar, C, Gottlieb, S, Rummukainen, K, Heller, UM, Hetrick, JE, Toussaint, WD, Kärkkäinen, L, Sugar, RL & Wingate, M 2000, 'Equation of state for two flavor QCD at Nt=6', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 61, no. 3, pp. 6861-6869.
Bernard C, Blum T, DeTar C, Gottlieb S, Rummukainen K, Heller UM et al. Equation of state for two flavor QCD at Nt=6. Physical Review D - Particles, Fields, Gravitation and Cosmology. 2000;61(3):6861-6869.
Bernard, Claude ; Blum, Tom ; DeTar, Carleton ; Gottlieb, Steven ; Rummukainen, Kari ; Heller, Urs M. ; Hetrick, James E. ; Toussaint, William D ; Kärkkäinen, Leo ; Sugar, R. L. ; Wingate, Matthew. / Equation of state for two flavor QCD at Nt=6. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2000 ; Vol. 61, No. 3. pp. 6861-6869.
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