2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/180358We calculate one-loop renormalization factors for heavy-light bilinears as well as four-fermion operators relevant for $B^{0} - \bar{B}^{0}$ mixing calculations on the lattice. We use the static approximation for heavy quarks and the domain-wall formulation for light quarks. We present results for different choices of improved gauge action.21 pages, 3 figures, 3 tables, revtex4High Energy Physics - LatticePerturbative renormalization for static and domain-wall bilinears and four-fermion operators with improved gauge actionstext