Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2003-10-15
Physics
High Energy Physics
High Energy Physics - Lattice
8 pages, 9 figures, Talk presented at the 2nd Workshop on Lattice Hadron Physics (LHP2003), July 22-30, 2003, Cairns, Australi
Scientific paper
10.1016/S0920-5632(03)02465-4
The CP-PACS and JLQCD Collaborations have been made systematic studies of lattice QCD carrying out both chiral and continuum extrapolations. Importance of dynamical quark effects has been clarified by a comparison of quenched QCD and two flavor full QCD simulations. In two flavor simulations, the dynamical effects of $u$ and $d$ quarks are taken into account, but the third quark $s$ is still treated in a quenched approximation. As the final step towards a fully realistic lattice simulation of QCD, two collaborations started a joint project of three flavor QCD, concentrating all big computers available. Based on a series of preparative studies of exact simulation algorithm and non-perturbative improvement coefficient, a large scale simulation of three flavor QCD has been started. I present the results of light hadron spectrum and light quark masses from the first production runs.
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