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Title: Equation of state for two flavor QCD at N{sub t}=6

Abstract

We calculate the two flavor equation of state for QCD on lattices with lattice spacing a=(6T){sup {minus}1} and find that cutoff effects are substantially reduced compared to an earlier study using a=(4T){sup {minus}1}. However, it is likely that significant cutoff effects remain. We fit the lattice data to expected forms of the free energy density for a second order phase transition at zero-quark mass, which allows us to extrapolate the equation of state to m{sub q}=0 and to extract the speed of sound. We find that the equation of state depends weakly on the quark mass for small quark mass. {copyright} {ital 1997} {ital The American Physical Society}

Authors:
 [1];  [2];  [3]; ;  [4];  [5]; ;  [6];  [7];  [8];  [9]
  1. Department of Physics, Washington University, St. Louis, Missouri 63130 (United States)
  2. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States)
  3. Physics Department, University of Utah, Salt Lake City, Utah 84112 (United States)
  4. Department of Physics, Indiana University, Bloomington, Indiana 47405 (United States)
  5. SCRI, Florida State University, Tallahassee, Florida 32306-4052 (United States)
  6. Department of Physics, University of Arizona, Tucson, Arizona 85721 (United States)
  7. Nokia Research Center, P.O. Box 100, FIN-33721 Tampere (Finland)
  8. Department of Physics, University of California, Santa Barbara, California 93106 (United States)
  9. Physics Department, University of Colorado, Boulder, Colorado 80309 (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
OSTI Identifier:
656096
DOE Contract Number:
AC02-76CH00016; AC02-86ER40253; FG02-91ER40628; FG03-95ER40906; FG05-92ER40742; FG02-85ER25000
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review, D; Journal Volume: 55; Journal Issue: 11; Other Information: PBD: Jun 1997
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; QUANTUM CHROMODYNAMICS; EQUATIONS OF STATE; QUARK MATTER; FLAVOR; LATTICE FIELD THEORY; FREE ENERGY; ENERGY DENSITY; PHASE TRANSFORMATIONS; QUARKS; MASS; SIMULATION

Citation Formats

Bernard, C., Blum, T., DeTar, C., Gottlieb, S., Rummukainen, K., Heller, U.M., Hetrick, J.E., Toussaint, D., Kaerkkaeinen, L., Sugar, R.L., and Wingate, M.. Equation of state for two flavor QCD at N{sub t}=6. United States: N. p., 1997. Web. doi:10.1103/PhysRevD.55.6861.
Bernard, C., Blum, T., DeTar, C., Gottlieb, S., Rummukainen, K., Heller, U.M., Hetrick, J.E., Toussaint, D., Kaerkkaeinen, L., Sugar, R.L., & Wingate, M.. Equation of state for two flavor QCD at N{sub t}=6. United States. doi:10.1103/PhysRevD.55.6861.
Bernard, C., Blum, T., DeTar, C., Gottlieb, S., Rummukainen, K., Heller, U.M., Hetrick, J.E., Toussaint, D., Kaerkkaeinen, L., Sugar, R.L., and Wingate, M.. 1997. "Equation of state for two flavor QCD at N{sub t}=6". United States. doi:10.1103/PhysRevD.55.6861.
@article{osti_656096,
title = {Equation of state for two flavor QCD at N{sub t}=6},
author = {Bernard, C. and Blum, T. and DeTar, C. and Gottlieb, S. and Rummukainen, K. and Heller, U.M. and Hetrick, J.E. and Toussaint, D. and Kaerkkaeinen, L. and Sugar, R.L. and Wingate, M.},
abstractNote = {We calculate the two flavor equation of state for QCD on lattices with lattice spacing a=(6T){sup {minus}1} and find that cutoff effects are substantially reduced compared to an earlier study using a=(4T){sup {minus}1}. However, it is likely that significant cutoff effects remain. We fit the lattice data to expected forms of the free energy density for a second order phase transition at zero-quark mass, which allows us to extrapolate the equation of state to m{sub q}=0 and to extract the speed of sound. We find that the equation of state depends weakly on the quark mass for small quark mass. {copyright} {ital 1997} {ital The American Physical Society}},
doi = {10.1103/PhysRevD.55.6861},
journal = {Physical Review, D},
number = 11,
volume = 55,
place = {United States},
year = 1997,
month = 6
}
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