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High Energy Physics - Lattice

arXiv:hep-lat/0405029 (hep-lat)
[Submitted on 27 May 2004 (v1), last revised 28 Nov 2004 (this version, v2)]

Title:QCD Thermodynamics with Three Flavors of Improved Staggered Quarks

Authors:The MILC Collaboration: C. Bernard, T. Burch, C. DeTar, Steven Gottlieb, E.B. Gregory, U.M. Heller, J. Osborn, R. Sugar, D. Toussaint
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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^2) 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_s, and for degenerate up and down quarks with masses in the range 0.1 m_s \leq m_{u,d} \leq 0.6 m_s, 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.
Comments: 33 pages, 18 figures, new data at a lighter quark mass, and revision of several figures
Subjects: High Energy Physics - Lattice (hep-lat)
Cite as: arXiv:hep-lat/0405029
  (or arXiv:hep-lat/0405029v2 for this version)
  https://doi.org/10.48550/arXiv.hep-lat/0405029
Journal reference: Phys.Rev.D71:034504,2005
Related DOI: https://doi.org/10.1103/PhysRevD.71.034504

Submission history

From: Robert L. Sugar [view email]
[v1] Thu, 27 May 2004 22:34:00 UTC (223 KB)
[v2] Sun, 28 Nov 2004 22:53:12 UTC (254 KB)
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