Towards a QCD equation of state with 2+1+1 flavors using the HISQ action

MILC Collaboration

Research output: Contribution to journalArticle

Abstract

We present first, preliminary results for the QCD equation of state with 2+1+1 flavors of highly improved staggered quarks (HISQ), that is, including the effects of a dynamical charm quark. This first study uses a line of constant physics (LCP) with the light-quark mass at ml = ms/5 and physical strange- and charm-quark masses. With increasing temperature, the effects of the charm quark, as in earlier partially quenched studies, start to be visible at temperatures where the equation of state is becoming insensitive to the value of the light (up/down) quark mass.

Original languageEnglish (US)
Article number063
JournalProceedings of Science
VolumePart F130497
StatePublished - 2012

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equations of state
quantum chromodynamics
quarks
physics
temperature

ASJC Scopus subject areas

  • General

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Towards a QCD equation of state with 2+1+1 flavors using the HISQ action. / MILC Collaboration.

In: Proceedings of Science, Vol. Part F130497, 063, 2012.

Research output: Contribution to journalArticle

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abstract = "We present first, preliminary results for the QCD equation of state with 2+1+1 flavors of highly improved staggered quarks (HISQ), that is, including the effects of a dynamical charm quark. This first study uses a line of constant physics (LCP) with the light-quark mass at ml = ms/5 and physical strange- and charm-quark masses. With increasing temperature, the effects of the charm quark, as in earlier partially quenched studies, start to be visible at temperatures where the equation of state is becoming insensitive to the value of the light (up/down) quark mass.",
author = "{MILC Collaboration} and A. Bazavov and C. Bernard and C. DeTar and J. Foley and Steven Gottlieb and Heller, {Urs M.} and Hetrick, {J. E.} and J. Laiho and L. Levkova and J. Osborn and R. Sugar and Toussaint, {William D} and {Van De Water}, {R. S.} and R. Zhou",
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T1 - Towards a QCD equation of state with 2+1+1 flavors using the HISQ action

AU - MILC Collaboration

AU - Bazavov, A.

AU - Bernard, C.

AU - DeTar, C.

AU - Foley, J.

AU - Gottlieb, Steven

AU - Heller, Urs M.

AU - Hetrick, J. E.

AU - Laiho, J.

AU - Levkova, L.

AU - Osborn, J.

AU - Sugar, R.

AU - Toussaint, William D

AU - Van De Water, R. S.

AU - Zhou, R.

PY - 2012

Y1 - 2012

N2 - We present first, preliminary results for the QCD equation of state with 2+1+1 flavors of highly improved staggered quarks (HISQ), that is, including the effects of a dynamical charm quark. This first study uses a line of constant physics (LCP) with the light-quark mass at ml = ms/5 and physical strange- and charm-quark masses. With increasing temperature, the effects of the charm quark, as in earlier partially quenched studies, start to be visible at temperatures where the equation of state is becoming insensitive to the value of the light (up/down) quark mass.

AB - We present first, preliminary results for the QCD equation of state with 2+1+1 flavors of highly improved staggered quarks (HISQ), that is, including the effects of a dynamical charm quark. This first study uses a line of constant physics (LCP) with the light-quark mass at ml = ms/5 and physical strange- and charm-quark masses. With increasing temperature, the effects of the charm quark, as in earlier partially quenched studies, start to be visible at temperatures where the equation of state is becoming insensitive to the value of the light (up/down) quark mass.

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