Light hadron spectrum in three-flavor QCD with O(a)-improved Wilson quark action

Details Light hadron spectrum in three-flavor QCD with O(a)-improved Wilson quark action Light hadron spectrum in three-flavor QCD with O(a)-improved Wilson quark action

2003-09-20

arxiv.org/abs/hep-lat/0309137v2

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages, 4 figures, Lattice2003(spectrum), Fig.1 corrected

Scientific paper

We report on a calculation of the light hadron spectrum and quark masses in three-flavor dynamical QCD using the non-perturbatively O(a)-improved Wilson quark action and a renormalization-group improved gauge action. Simulations are carried out on a 16^3 \times 32 lattice at \beta=1.9, where a^{-1} \simeq 2GeV, with 6 ud quark masses corresponding to m_{pi}/m_{rho} \simeq 0.64-0.77 and 2 s quark masses close to the physical value. We observe that the inclusion of dynamical strange quark brings the lattice QCD meson spectrum to good agreement with experiment. Dynamical strange quarks also lead to a reduction of the uds quark masses by about 15%.

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