@article{oai:tsukuba.repo.nii.ac.jp:00024766, author = {青木, 愼也 and Takeda, K. and Aoki, S. and Hashimoto, S. and Kaneko, T. and Noaki, J. and Onogi, T.}, issue = {11}, journal = {Physical review D}, month = {Jun}, note = {The strange quark content of the nucleon is calculated in dynamical lattice QCD employing the overlap fermion formulation. For this quantity, exact chiral symmetry guaranteed by the Ginsparg-Wilson relation is crucial to avoid large contamination due to a possible operator mixing with u? u+d? d. Gauge configurations are generated with two dynamical flavors on a 163×32 lattice at a lattice spacing a?0.12??fm. We directly calculate the relevant three-point function on the lattice including a disconnected strange quark loop utilizing the techniques of the all-to-all quark propagator and low-mode averaging. Our result fTs=ms/MN=0.032(8)stat(22)sys, where ms and MN are strange quark and nucleon masses, is in good agreement with our previous indirect estimate using the Feynman-Hellmann theorem.}, title = {Nucleon strange quark content from two-flavor lattice QCD with exact chiral symmetry}, volume = {83}, year = {2011} }