arXiv:0710.3467·v1·High Energy Physics — Lattice
Application of chiral perturbation theory to 2+1 flavor lattice QCD with O(a)-improved Wilson quarks
PACS-CS Collaboration: D. Kadoh🇯🇵 · S. Aoki · N. Ishii · K.I. Ishikawa · N. Ishizuka · T. Izubuchi · K. Kanaya · Y. Kuramashi · Y. Namekawa · M. Okawa · K. Sasaki · Y. Taniguchi
Abstract
We apply chiral perturbation theory to the pseudoscalar meson mass and decay constant data obtained in the PACS-CS Project toward 2+1 flavor lattice QCD simulations with the O(a)-improved Wilson quarks. We examine the existence of chiral logarithms in the quark mass range from m_{ud}=47 MeV down to 6 MeV on a (2.8 fm)^3 box with the lattice spacing a=0.09 fm. Several low energy constants are determined. We also discuss the magnitude of finite size effects based on chiral perturbation theory.
Comments: 7 pages, 6 figures, talk presented at the XXV International Symposium on Lattice Field Theory, July 30 - August 4 2007, Regensburg, Germany