We present preliminary results for the light harden spectrum in Nf=2+1 lattice QCD obtained with the nonperturbatively O(a)-improved Wilson quark action and the Iwasaki gauge action. Simulations are carried out at β=1.90 on a 323×64 lattice using the PACS-CS computer. We employ L\"uscher's domain-decomposed HMC algorithm to reduce the up-down quark masses toward the physical value. The pseudoscalar meson masses range from 730 MeV down to 210 MeV. We compare the light harden spectrum extrapolated to the physical point with the experimental values.
@article{arxiv.0710.3462,
title = {Light hadron spectrum with 2+1 flavor dynamical $O(a)$-improved Wilson quarks},
author = {CS Collaboration and N. Ukita and S. Aoki and N. Ishii and K. -I. Ishikawa and N. Ishizuka and T. Izubuchi and D. Kadoh and K. Kanaya and Y. Kuramashi and Y. Namekawa and M. Okawa and K. Sasaki and Y. Taniguchi and A. Ukawa and T. Yoshie},
journal= {arXiv preprint arXiv:0710.3462},
year = {2012}
}
Comments
7 pages, 11 figures, talk presented at the XXV International Symposium on Lattice Field Theory, July 30 - August 4, 2007, Regensburg, Germany