Abstract
We report on our study of light hadron spectrum and quark masses in QCD with two flavors of dynamical quarks. Simulations are made with the plaquette gauge action and the non-pertubatively O( a) improved Wilson quark action. We simulate 5 sea qaurk masses corresponding to m PS/ m V ⋍ 0.8-0.6 at β = 5.2 on 12 3 × 48, 16 3 × 48 and 20 3 × 48 lattices. A comparison with previous calculations in quenched QCD indicates sea quark effects in meson and quark masses.
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