## 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 language Undefined/Unknown Physical Review D https://doi.org/10.1103/PhysRevD.76.014504 Published - 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.

• hep-lat

ID: 11157552