Improved Wilson QCD simulations with light quark masses

Phys. Rev. D 70, 014501 – Published 9 July 2004
C. R. Allton, A. Hart, D. Hepburn, A. C. Irving, B. Joó, C. McNeile, C. Michael, and S. V. Wright (UKQCD Collaboration)


We present results from simulations using 2 flavors of O(a)-improved Wilson quarks whose masses are about 1/3 of the physical strange quark mass. We present new data on the mass of the singlet pseudoscalar meson and evidence of the onset of chiral logarithms in the pion decay constant. The previously observed suppression of the topological susceptibility at lighter quark masses is confirmed. We report on the performance of the hybrid Monte Carlo algorithm at light quark masses.


  • Received 6 March 2004
  • Published 9 July 2004

© 2004 The American Physical Society

Authors & Affiliations

C. R. Allton1, A. Hart2, D. Hepburn2, A. C. Irving3, B. Joó2, C. McNeile3, C. Michael3, S. V. Wright3, and ((UKQCD Collaboration))

  • 1Department of Physics, University of Wales Swansea, Swansea SA2 8PP, Wales
  • 2School of Physics, University of Edinburgh, Edinburgh EH9 3JZ, Scotland
  • 3Division of Theoretical Physics, Department of Mathematical Sciences, University of Liverpool, Liverpool L69 7ZL, England

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