2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/191552The gauge threshold corrections for globally consistent Z2 x Z2' orientifolds with rigid intersecting D6-branes are computed. The one-loop corrections to the holomorphic gauge kinetic function are extracted and the Kaehler metrics for the charged chiral multiplets are determined up to two constants.22 pages, 1 figure; v2: minor modifications, version to appear in JHEPHigh Energy Physics - Theorytext