2+1 flavor domain wall QCD on a (2 fm)*83 lattice: Light meson spectroscopy with L(s) = 16
Jan, 200717 pages
Published in:
- Phys.Rev.D 76 (2007) 014504
e-Print:
- hep-lat/0701013 [hep-lat]
Report number:
- BNL-HET-07-1,
- CU-TP-1175,
- EDINBURGH-2007-1,
- KEK-TH-1132,
- RBRC-637,
- SHEP-0701,
- SWAT-07-502
Experiments:
View in:
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Abstract: (arXiv)
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.Note:
- RBC and UKQCD Collaborations. 17 pages, 14 figures. Typeset with ReVTEX4. v2: replaced with the version published in PRD with improved introduction
- 12.38.Gc
- 12.38.-t
- 11.15.Ha
- 12.38.Aw
- quantum chromodynamics
- lattice field theory
- fermion: domain wall
- flavor: 3
- meson: mass
- pseudoscalar meson: decay constant
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