2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/140444The paper deals with a next-to-leading order analysis of the radiative $B \to K^* γ$ decay. Working in a PQCD approach, we compute the correction to the essential form factor, coming from a single gluon exchange with the spectator. We investigate the supersymmetry effects on the branching ratio and direct CP asymmetry and constrain the squark mixing parameter $(δ_{23}^d)_{LR}$.7 pages, 3 figures, International Conference on Hadron Physics TROIA'07, Canakkale, Turkey, 30 August -- 03 September 2007High Energy Physics - Phenomenologytext