Edinburgh Research Explorer

2+1 flavor domain wall QCD on a (2 fm)^3 lattice: light meson spectroscopy with Ls = 16

Research output: Contribution to journalArticle

  • C. Allton
  • D. J. Antonio
  • T. Blum
  • N. H. Christ
  • S. D. Cohen
  • M. A. Clark
  • C. Dawson
  • K. Hashimoto
  • T. Izubuchi
  • A. Juttner
  • C. Jung
  • S. Li
  • M. F. Lin
  • R. D. Mawhinney
  • J. Noaki
  • S. Ohta
  • S. Sasaki
  • E. E. Scholz
  • A. Soni
  • R. J. Tweedie
  • T. Yamazaki

Related Edinburgh Organisations

Original languageUndefined/Unknown
JournalPhysical Review D
DOIs
Publication statusPublished - 17 Jan 2007

Abstract

We present results for light meson masses and pseudoscalar decay constants from the first of a series of lattice calculations with 2+1 dynamical flavors of domain wall fermions and the Iwasaki gauge action. The work reported here was done at a fixed lattice spacing of about 0.12 fm on a 16^3\times32 lattice, which amounts to a spatial volume of (2 fm)^3 in physical units. The number of sites in the fifth dimension is 16, which gives m_{res} = 0.00308(4) in these simulations. Three values of input light sea quark masses, m_l^{sea} \approx 0.85 m_s, 0.59 m_s and 0.33 m_s were used to allow for extrapolations to the physical light quark limit, whilst the heavier sea quark mass was fixed to approximately the physical strange quark mass m_s. The exact rational hybrid Monte Carlo algorithm was used to evaluate the fractional powers of the fermion determinants in the ensemble generation. We have found that f_\pi = 127(4) MeV, f_K = 157(5) MeV and f_K/f_\pi = 1.24(2), where the errors are statistical only, which are in good agreement with the experimental values.

    Research areas

  • hep-lat

ID: 11157552