2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/118982We present results on the NLO (alpha_s^2) spectator-scattering corrections to the topological penguin amplitudes for charmless hadronic two-body B-decays in QCD factorization. The corrections can be sizable for the colour-suppressed electroweak penguin amplitudes alpha_{4,EW}^p but otherwise are numerically small. Our results explicitly demonstrate factorization at this order. To assess the phenomenological viability of the framework, we consider penguin-to-tree ratios in the penguin-dominated pi K system and find agreement to the expected precision (i.e., a power correction).4 pages, 2 figures, talk given at ICHEP 2006, 26 July - 2 August, MoscowHigh Energy Physics - Phenomenologytext