Lattice QCD ensembles with four flavors of highly improved staggered quarks

A. Bazavov, C. Bernard, J. Komijani, C. DeTar, L. Levkova, W. Freeman, Steven Gottlieb, Ran Zhou, U. M. Heller, J. E. Hetrick, J. Laiho, J. Osborn, R. L. Sugar, D. Toussaint, and R. S. Van de Water (MILC Collaboration)
Phys. Rev. D 87, 054505 – Published 14 March 2013

Abstract

We present results from our simulations of quantum chromodynamics with four flavors of quarks: u, d, s, and c. These simulations are performed with a one-loop Symanzik improved gauge action and the highly improved staggered quark action. We are generating gauge configurations with four values of the lattice spacing ranging from 0.06 to 0.15 fm, and three values of the light quark mass, including the value for which the Goldstone pion mass is equal to the physical pion mass. We discuss simulation algorithms, scale setting, taste symmetry breaking, and the autocorrelations of various quantities. We also present results for the topological susceptibility that demonstrate the improvement of the highly improved staggered quark configurations relative to those generated earlier with the asqtad improved staggered action.

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  • Received 25 December 2012

DOI:https://doi.org/10.1103/PhysRevD.87.054505

© 2013 American Physical Society

Authors & Affiliations

A. Bazavov1, C. Bernard2, J. Komijani2, C. DeTar3, L. Levkova3,*, W. Freeman4, Steven Gottlieb5, Ran Zhou5, U. M. Heller6, J. E. Hetrick7, J. Laiho8, J. Osborn9, R. L. Sugar10, D. Toussaint11, and R. S. Van de Water12 (MILC Collaboration)

  • 1Physics Department, Brookhaven National Laboratory, Upton, New York 11973, USA
  • 2Department of Physics, Washington University, St. Louis, Missouri 63130, USA
  • 3Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
  • 4Department of Physics, The George Washington University, Washington, DC 20052, USA
  • 5Department of Physics, Indiana University, Bloomington, Indiana 47405, USA
  • 6American Physical Society, One Research Road, Ridge, New York 11961, USA
  • 7Physics Department, University of the Pacific, Stockton, California 95211, USA
  • 8Department of Physics and Astronomy, University of Glasgow, Glasgow, G12 8GG Scotland, United Kingdom
  • 9Argonne National Laboratory, Argonne Leadership Computing Facility, Argonne, Illinois 60439, USA
  • 10Department of Physics, University of California, Santa Barbara, California 93106, USA
  • 11Department of Physics, University of Arizona, Tucson, Arizona 85721, USA
  • 12Theoretical Physics Department, Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA

  • *Present address: Department of Physics, University of Arizona, Tucson, AZ 85721, USA.

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Vol. 87, Iss. 5 — 1 March 2013

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