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2+1flavor domain wall QCD on a(2  fm)3lattice: Light meson spectroscopy withLs=16 / T. Yamazaki, A. Soni, R.D. Kenway, A. Yamaguchi, B.J. Pendleton, K.C. Bowler, Shigemi Ohta, Anthony D. Kennedy, Robert D. Mawhinney, S. Li, S. Sasaki, K. Hashimoto, M. Li, N.H. Christ, C. Jung, Taku Izubuchi, C. Dawson, C.M. Maynard, J. Noaki, A. Hart, Enno E. Scholz, A. Juttner, D. Saul, R.J. Tweedie, M.F. Lin, M.A. Clark, D.J. Antonio, Peter A. Boyle, Thomas Charles Blum, Chris Allton

Physical Review D, Volume: 76, Issue: 1

Swansea University Author: Chris Allton

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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...

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Published in: Physical Review D
ISSN: 1550-7998 1550-2368
Published: 2007
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URI: https://cronfa.swan.ac.uk/Record/cronfa28498
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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.
College: College of Science
Issue: 1