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Phys. Rev. D 56, 5584–5595 (1997)

QCD thermodynamics with an improved lattice action

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Claude Bernard and James E. Hetrick
Department of Physics, Washington University, St. Louis, Missouri 63130

Thomas DeGrand and Matthew Wingate
Department of Physics, University of Colorado, Boulder, Colorado 80309

Carleton DeTar
Department of Physics, University of Utah, Salt Lake City, Utah 84112

Steven Gottlieb
Department of Physics, Indiana University, Bloomington, Indiana 47405

Urs M. Heller
SCRI, Florida State University, Tallahassee, Florida 32306-4052

Kari Rummukainen
Fakultät für Physik, Universität Bielefeld, D-33615, Bielefeld, Germany

Doug Toussaint
Department of Physics, University of Arizona, Tucson, Arizona 85721

Robert L. Sugar
Department of Physics, University of California, Santa Barbara, California 93106

(MILC Collaboration)

Received 7 March 1997; revised 29 May 1997; published in the issue dated 1 November 1997

We have investigated QCD with two flavors of degenerate fermions using the Symanzik-improvement program for both the gauge and fermion actions. Our study focuses on the deconfinement transition on an Nt=4 lattice. Having located the thermal transition, we performed zero temperature simulations nearby in order to compute hadronic masses and the static quark potential. We find that this action reduces lattice artifacts present in thermodynamics with the standard Wilson (gauge and fermion) actions. However, comparisons between improved Wilson and Kogut-Susskind actions show some disagreement.

© 1997 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.56.5584
DOI:
10.1103/PhysRevD.56.5584
PACS:
12.38.Gc, 11.10.Wx, 12.38.Mh
 
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