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Finite ma Errors in Overlap Fermions

Presenter: Shao-Jing Dong — University of Kentucky

Shao-Jing Dong, Keh Fei Liu, Jianbo Zhang, χ-QCD

Finite ma errors with overlap fermions are studied by calculating the dispersion relation and hyperfine splitting between vector and pseudoscalar mesons on various isotropic and anisotropic quenched lattices. We find that the ma errors are mostly propotional to (ma)2 and suggest that ma should be limited to less than 0.5 in order to keep the systematic ma errors below 3 to 5% level.