The QCD equation of state with dynamical quarks

Szabolcs Borsányi, Gergely Endrodi, Z. Fodor, A. Jakovác, S. Katz, Stefan Krieg, Claudia Ratti, Kálmán K. Szabó

Research output: Contribution to journalArticle

621 Citations (Scopus)

Abstract

The present paper concludes our investigation on the QCD equation of state with 2 + 1 staggered flavors and one-link stout improvement. We extend our previous study [JHEP 01 (2006) 089] by choosing even finer lattices. Lattices with N t = 6, 8 and 10 are used, and the continuum limit is approached by checking the results at N t = 12. A Symanzik improved gauge and a stout-link improved staggered fermion action is utilized. We use physical quark masses, that is, for the lightest staggered pions and kaons we fix the m π/fK and m K/fK ratios to their experimental values. The pressure, the interaction measure, the energy and entropy density and the speed of sound are presented as functions of the temperature in the range 100. .. 1000MeV. We give estimates for the pion mass dependence and for the contribution of the charm quark. We compare our data to the equation of state obtained by the "hotQCD" collaboration.

Original languageEnglish
Article number077
JournalJournal of High Energy Physics
Volume2010
Issue number11
DOIs
Publication statusPublished - 2010

Fingerprint

pions
equations of state
quantum chromodynamics
quarks
kaons
fixing
flux density
fermions
entropy
continuums
acoustics
estimates
interactions
temperature

Keywords

  • Lattice gauge field theories
  • Lattice QCD

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

The QCD equation of state with dynamical quarks. / Borsányi, Szabolcs; Endrodi, Gergely; Fodor, Z.; Jakovác, A.; Katz, S.; Krieg, Stefan; Ratti, Claudia; Szabó, Kálmán K.

In: Journal of High Energy Physics, Vol. 2010, No. 11, 077, 2010.

Research output: Contribution to journalArticle

Borsányi, Szabolcs ; Endrodi, Gergely ; Fodor, Z. ; Jakovác, A. ; Katz, S. ; Krieg, Stefan ; Ratti, Claudia ; Szabó, Kálmán K. / The QCD equation of state with dynamical quarks. In: Journal of High Energy Physics. 2010 ; Vol. 2010, No. 11.
@article{ac840dbc00904e0eb46376d0196ac0ac,
title = "The QCD equation of state with dynamical quarks",
abstract = "The present paper concludes our investigation on the QCD equation of state with 2 + 1 staggered flavors and one-link stout improvement. We extend our previous study [JHEP 01 (2006) 089] by choosing even finer lattices. Lattices with N t = 6, 8 and 10 are used, and the continuum limit is approached by checking the results at N t = 12. A Symanzik improved gauge and a stout-link improved staggered fermion action is utilized. We use physical quark masses, that is, for the lightest staggered pions and kaons we fix the m π/fK and m K/fK ratios to their experimental values. The pressure, the interaction measure, the energy and entropy density and the speed of sound are presented as functions of the temperature in the range 100. .. 1000MeV. We give estimates for the pion mass dependence and for the contribution of the charm quark. We compare our data to the equation of state obtained by the {"}hotQCD{"} collaboration.",
keywords = "Lattice gauge field theories, Lattice QCD",
author = "Szabolcs Bors{\'a}nyi and Gergely Endrodi and Z. Fodor and A. Jakov{\'a}c and S. Katz and Stefan Krieg and Claudia Ratti and Szab{\'o}, {K{\'a}lm{\'a}n K.}",
year = "2010",
doi = "10.1007/JHEP11(2010)077",
language = "English",
volume = "2010",
journal = "Journal of High Energy Physics",
issn = "1126-6708",
publisher = "Springer Verlag",
number = "11",

}

TY - JOUR

T1 - The QCD equation of state with dynamical quarks

AU - Borsányi, Szabolcs

AU - Endrodi, Gergely

AU - Fodor, Z.

AU - Jakovác, A.

AU - Katz, S.

AU - Krieg, Stefan

AU - Ratti, Claudia

AU - Szabó, Kálmán K.

PY - 2010

Y1 - 2010

N2 - The present paper concludes our investigation on the QCD equation of state with 2 + 1 staggered flavors and one-link stout improvement. We extend our previous study [JHEP 01 (2006) 089] by choosing even finer lattices. Lattices with N t = 6, 8 and 10 are used, and the continuum limit is approached by checking the results at N t = 12. A Symanzik improved gauge and a stout-link improved staggered fermion action is utilized. We use physical quark masses, that is, for the lightest staggered pions and kaons we fix the m π/fK and m K/fK ratios to their experimental values. The pressure, the interaction measure, the energy and entropy density and the speed of sound are presented as functions of the temperature in the range 100. .. 1000MeV. We give estimates for the pion mass dependence and for the contribution of the charm quark. We compare our data to the equation of state obtained by the "hotQCD" collaboration.

AB - The present paper concludes our investigation on the QCD equation of state with 2 + 1 staggered flavors and one-link stout improvement. We extend our previous study [JHEP 01 (2006) 089] by choosing even finer lattices. Lattices with N t = 6, 8 and 10 are used, and the continuum limit is approached by checking the results at N t = 12. A Symanzik improved gauge and a stout-link improved staggered fermion action is utilized. We use physical quark masses, that is, for the lightest staggered pions and kaons we fix the m π/fK and m K/fK ratios to their experimental values. The pressure, the interaction measure, the energy and entropy density and the speed of sound are presented as functions of the temperature in the range 100. .. 1000MeV. We give estimates for the pion mass dependence and for the contribution of the charm quark. We compare our data to the equation of state obtained by the "hotQCD" collaboration.

KW - Lattice gauge field theories

KW - Lattice QCD

UR - http://www.scopus.com/inward/record.url?scp=78649748483&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78649748483&partnerID=8YFLogxK

U2 - 10.1007/JHEP11(2010)077

DO - 10.1007/JHEP11(2010)077

M3 - Article

AN - SCOPUS:78649748483

VL - 2010

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1126-6708

IS - 11

M1 - 077

ER -