Perturbative renormalization factors of quark operators for domain-wall QCD

We calculate one-loop renormalization factors of several quark operators in cluding bilinear, three- and four-quark operator for domain-wall fermion ac tion. Since Green functions are constructed for external physical quark fie lds, our renormalization method is simple and can be easily applied to calc ulation of any quark operators. Our results show that these renormalized qu ark operators preserve several chiral properties of continuum massless QCD, which can be understood by the property of external quark line propagator.