We report on a numerical simulation with 2+1 dynamical flavors of overlap fermions. We calculate pseudo-scalar masses and decay constants on a 163×48×(0.11fm)4 lattice at five different up and down quark masses and two strange quark masses. The lightest pion mass corresponds to ≈310 MeV. We also study the validity of the chiral perturbation theory using the results of the numerical simulation with two dynamical flavors and conclude that the one-loop formulae cannot be directly applied in the strange quark mass region. We therefore extrapolate our 2+1-flavor results to the chiral limit by fitting the data to the two-loop formulae of the chiral perturbation theory.
@article{arxiv.0810.1360,
title = {Light meson spectrum with $N_f=2+1$ dynamical overlap fermions},
author = {J. Noaki and S. Aoki and T. W. Chiu and H. Fukaya and S. Hashimoto and T. H. Hsieh and T. Kaneko and H. Matsufuru and T. Onogi and E. Shintani and N. Yamada},
journal= {arXiv preprint arXiv:0810.1360},
year = {2010}
}
Comments
7 pages, 7 figure files. Talk given at the XXVI International Symposium on Lattice Field Theory, July 14 - 19 2008, Williamsburg, Virginia, USA