We present preliminary results of the PACS-CS project which simulates 2+1 flavor lattice QCD toward the physical point with the nonperturbatively O(a)-improved Wilson quark action and the Iwasaki gauge action. Calculations are carried out at beta=1.9 on a 32^3x64 lattice with the use of the domain-decomposed HMC algorithm to reduce the up-down quark mass. The resulting pseudoscalar meson masses range from 730 MeV down to 210 MeV. We discuss the physical results including the chiral analysis in the pseudoscalar meson sector and the hadron spectrum. Some algorithmic issues are also discussed.
@article{arxiv.0711.3938,
title = {Nf=2+1 dynamical Wilson quark simulation toward the physical point},
author = {Yoshinobu Kuramashi},
journal= {arXiv preprint arXiv:0711.3938},
year = {2009}
}
Comments
20 pages, 31 figures, 8 tables. Proceeding of the plenary talk at The XXV International Symposium on Lattice Field Theory, July 30-4 August 2007, Regensburg, Germany