Quenched hadron spectroscopy with improved staggered quark action

Claude Bernard, Tom Blum, Thomas A. DeGrand, Carleton DeTar, Steven Gottlieb, Urs M. Heller, James E. Hetrick, Craig McNeile, K. Rummukainen, Bob Sugar, and Doug Toussaint
Phys. Rev. D 58, 014503 – Published 15 May 1998
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Abstract

We investigate light hadron spectroscopy with an improved quenched staggered quark action. We compare the results obtained with an improved gauge plus an improved quark action, an improved gauge plus standard quark action, and the standard gauge plus standard quark action. Most of the improvement in the spectroscopy results is due to the improved gauge sector. However, the improved quark action substantially reduces violations of Lorentz invariance, as evidenced by the meson dispersion relations.

  • Received 9 December 1997

DOI:https://doi.org/10.1103/PhysRevD.58.014503

©1998 American Physical Society

Authors & Affiliations

Claude Bernard1, Tom Blum2, Thomas A. DeGrand3, Carleton DeTar4, Steven Gottlieb5, Urs M. Heller6, James E. Hetrick7, Craig McNeile4, K. Rummukainen8, Bob Sugar9, and Doug Toussaint10

  • 1Department of Physics, Washington University, St. Louis, Missouri 63130
  • 2Department of Physics, Brookhaven National Laboratory, Upton, New York 11973
  • 3Physics Department, University of Colorado, Boulder, Colorado 80309
  • 4Physics Department, University of Utah, Salt Lake City, Utah 84112
  • 5Department of Physics, Indiana University, Bloomington, Indiana 47405
  • 6Supercomputer Computations Research Institute, Florida State University, Tallahassee, Florida 32306-4130
  • 7Physics Department, University of the Pacific, Stockton, California 95211-0197
  • 8NORDITA, Blegdamsvej 17, DK-2100 Copenhagen /O, Denmark
  • 9Department of Physics, University of California, Santa Barbara, California 93106
  • 10Department of Physics, University of Arizona, Tucson, Arizona 85721

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Vol. 58, Iss. 1 — 1 July 1998

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