2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/105855We compute the 1-loop (NNLO) corrections to hard spectator-scattering in tree-dominated hadronic B decays. Depending on the values of hadronic input parameters the corrections are shown to have a significant impact on the B -> pi pi branching fractions.4 pages, uses PoS.cls (included). Contribution to the proceedings of the International Europhysics Conference on High Energy Physics, July 21st - 27th, 2005, Lisboa, PortugalHigh Energy Physics - Phenomenologytext