2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/214885We study the decay $B^\pm\to ϕK^{\ast\pm}$, followed by the decay of the outgoing vector mesons into two pseudoscalars. The analysis of angular distributions of the decay products is shown to provide useful information about the annihilation contributions and possible tests of factorization.9 pages, 1 tableHigh Energy Physics - Phenomenologytext