High temperature QCD with three flavors of improved staggered quarks

C. Bernard; T. Burch; C. E. DeTar; Steven Gottlieb; Eric Gregory; U. M. Heller; J. Osborn; R. L. Sugar; D. Toussaint

doi:10.1016/S0920-5632(03)01603-7

High temperature QCD with three flavors of improved staggered quarks

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

Physics

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

We present an update of our study of high temperature QCD with three flavors of quarks, using a Symanzik improved gauge action and the Asqtad staggered quark action. Simulations are being carried out on lattices with N_t = 4, 6 and 8 for the case of three degenerate quarks with masses less than or equal to the strange quark mass, m_s, and on lattices with N_t = 6 and 8 for degenerate up and down quarks with masses in the range 0.2m_s ≤ m_u,_d ≤ 0.6m_s, and the strange quark fixed near its physical value. We also report on first computations of quark number susceptibilities with the Asqtad action. These susceptibilities are of interest because they can be related to event-by-event fluctuations in heavy ion collision experiments. Use of the improved quark action leads to a substantial reduction in lattice artifacts. This can be seen already for free fermions and carries over into our results for QCD.

Original language	English (US)
Pages (from-to)	523-528
Number of pages	6
Journal	Nuclear Physics B - Proceedings Supplements
Volume	119
DOIs	https://doi.org/10.1016/S0920-5632(03)01603-7
State	Published - May 2003

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Nuclear and High Energy Physics

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title = "High temperature QCD with three flavors of improved staggered quarks",

abstract = "We present an update of our study of high temperature QCD with three flavors of quarks, using a Symanzik improved gauge action and the Asqtad staggered quark action. Simulations are being carried out on lattices with Nt = 4, 6 and 8 for the case of three degenerate quarks with masses less than or equal to the strange quark mass, ms, and on lattices with Nt = 6 and 8 for degenerate up and down quarks with masses in the range 0.2ms ≤ mu,d ≤ 0.6ms, and the strange quark fixed near its physical value. We also report on first computations of quark number susceptibilities with the Asqtad action. These susceptibilities are of interest because they can be related to event-by-event fluctuations in heavy ion collision experiments. Use of the improved quark action leads to a substantial reduction in lattice artifacts. This can be seen already for free fermions and carries over into our results for QCD.",

author = "C. Bernard and T. Burch and DeTar, {C. E.} and Steven Gottlieb and Eric Gregory and Heller, {U. M.} and J. Osborn and Sugar, {R. L.} and D. Toussaint",

note = "Funding Information: This work is supported by the US National Science Foundation and Department of Energy and used computer resources at Florida State University (SP), NCSA, NERSC, NPACI, FNAL, and the University of Utah (CHPC).",

year = "2003",

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doi = "10.1016/S0920-5632(03)01603-7",

language = "English (US)",

volume = "119",

pages = "523--528",

journal = "Nuclear Physics B - Proceedings Supplements",

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T1 - High temperature QCD with three flavors of improved staggered quarks

AU - Bernard, C.

AU - Burch, T.

AU - DeTar, C. E.

AU - Gottlieb, Steven

AU - Gregory, Eric

AU - Heller, U. M.

AU - Osborn, J.

AU - Sugar, R. L.

AU - Toussaint, D.

N1 - Funding Information: This work is supported by the US National Science Foundation and Department of Energy and used computer resources at Florida State University (SP), NCSA, NERSC, NPACI, FNAL, and the University of Utah (CHPC).

PY - 2003/5

Y1 - 2003/5

N2 - We present an update of our study of high temperature QCD with three flavors of quarks, using a Symanzik improved gauge action and the Asqtad staggered quark action. Simulations are being carried out on lattices with Nt = 4, 6 and 8 for the case of three degenerate quarks with masses less than or equal to the strange quark mass, ms, and on lattices with Nt = 6 and 8 for degenerate up and down quarks with masses in the range 0.2ms ≤ mu,d ≤ 0.6ms, and the strange quark fixed near its physical value. We also report on first computations of quark number susceptibilities with the Asqtad action. These susceptibilities are of interest because they can be related to event-by-event fluctuations in heavy ion collision experiments. Use of the improved quark action leads to a substantial reduction in lattice artifacts. This can be seen already for free fermions and carries over into our results for QCD.

AB - We present an update of our study of high temperature QCD with three flavors of quarks, using a Symanzik improved gauge action and the Asqtad staggered quark action. Simulations are being carried out on lattices with Nt = 4, 6 and 8 for the case of three degenerate quarks with masses less than or equal to the strange quark mass, ms, and on lattices with Nt = 6 and 8 for degenerate up and down quarks with masses in the range 0.2ms ≤ mu,d ≤ 0.6ms, and the strange quark fixed near its physical value. We also report on first computations of quark number susceptibilities with the Asqtad action. These susceptibilities are of interest because they can be related to event-by-event fluctuations in heavy ion collision experiments. Use of the improved quark action leads to a substantial reduction in lattice artifacts. This can be seen already for free fermions and carries over into our results for QCD.

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DO - 10.1016/S0920-5632(03)01603-7

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SP - 523

EP - 528

JO - Nuclear Physics B - Proceedings Supplements

JF - Nuclear Physics B - Proceedings Supplements

ER -

High temperature QCD with three flavors of improved staggered quarks

Abstract

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