@article{oai:tsukuba.repo.nii.ac.jp:00016861,
 author = {青木, 愼也 and Aoki, S. and Fukaya, H. and Hashimoto, S. and Noaki, J. and Kaneko, T. and Matsufuru, H. and Onogi, T. and Yamada, N.},
 issue = {9},
 journal = {Physical review D},
 month = {May},
 note = {We present a two-flavor QCD calculation of BK on a 163×32 lattice at a~0.12 fm (or equivalently a-1=1.67 GeV). Both valence and sea quarks are described by the overlap fermion formulation. The matching factor is calculated nonperturbatively with the so-called RI/MOM scheme. We find that the lattice data are well described by the next-to-leading order (NLO) partially quenched chiral perturbation theory (PQChPT) up to around a half of the strange quark mass (msphys/2). The data at quark masses heavier than msphys/2 are fitted including a part of next-to-next-to-leading order terms. We obtain BK[overline MS](2 GeV)=0.537(4)(40), where the first error is statistical and the second is an estimate of systematic uncertainties from finite volume, fixing topology, the matching factor, and the scale setting.},
 title = {BK with two flavors of dynamical overlap fermions},
 volume = {77},
 year = {2008}
}