2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37761We report preliminary results on the measurement of branching fractions of exclusive decays of neutral and charged B mesons into two-body final states containing a charmonium state and a light strange meson. The charmonium mesons considered are J/psi, psi(2S) and chic_c1, and the light mesons are either K or K*. We use a sample of about 124 million BBbar events collected with the BABAR detector at the PEP-II storage ring at the Stanford Linear Accelerator Center.18 pages, submitted to ICHEP2004High Energy Physics - Experimenttext