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Chiral and deconfinement aspects of the QCD transition

A. Bazavov1, T. Bhattacharya2, M. Cheng3, C. DeTar4, H.-T. Ding1, Steven Gottlieb5, R. Gupta2, P. Hegde1, U. M. Heller6 et al. (HotQCD Collaboration)

U. M. Heller6, F. Karsch1,7, E. Laermann7, L. Levkova4, S. Mukherjee1, P. Petreczky1, C. Schmidt7,8, R. A. Soltz3, W. Soeldner9, R. Sugar10, D. Toussaint11, W. Unger12, and P. Vranas3 (HotQCD Collaboration)

  • 1Physics Department, Brookhaven National Laboratory, Upton, New York 11973, USA
  • 2Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
  • 3Physics Division, Lawrence Livermore National Laboratory, Livermore, California 94550, USA
  • 4Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
  • 5Physics Department, Indiana University, Bloomington, Indiana 47405, USA
  • 6American Physical Society, One Research Road, Ridge, New York 11961, USA
  • 7Fakultät für Physik, Universität Bielefeld, D-33615 Bielefeld, Germany
  • 8Frankfurt Institute for Advanced Studies, J. W. Goethe Universität Frankfurt, D -60438 Frankfurt am Main, Germany
  • 9Institut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany
  • 10Physics Department, University of California, Santa Barbara, California 93106, USA
  • 11Physics Department, University of Arizona, Tucson, Arizona 85721, USA
  • 12Institut für Theoretische Physik, ETH Zürich, CH-8093 Zürich, Switzerland

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Phys. Rev. D 85, 054503 – Published 5 March, 2012

DOI: https://doi.org/10.1103/PhysRevD.85.054503

Abstract

We present results on the chiral and deconfinement properties of the QCD transition at finite temperature. Calculations are performed with 2+1 flavors of quarks using the p4, asqtad, and HISQ/tree actions. Lattices with temporal extent Nτ=6, 8, and 12 are used to understand and control discretization errors and to reliably extrapolate estimates obtained at finite lattice spacings to the continuum limit. The chiral transition temperature is defined in terms of the phase transition in a theory with two massless flavors and analyzed using O(N) scaling fits to the chiral condensate and susceptibility. We find consistent estimates from the HISQ/tree and asqtad actions and our main result is Tc=154±9  MeV.

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Phys. Rev. D 85, 054503– Published 5 March, 2012
  • Received 5 January 2012
Article part of CHORUS

© 2012 American Physical Society

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