2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/211421We analyse the constraints on dimension-six Delta F=1 effective operators in models respecting the MFV hypothesis, both in the one-Higgs doublet case and in the two-Higgs doublet scenario with large tan beta. The constraints are derived mainly from the b -> s inclusive observables measured at the B factories. The implications of these bounds in view of improved measurements in exclusive and inclusive observables in b -> s l^+ l^- and s -> d nu nubar transitions are discussed.23 pages, 7 figures (v2: very minor modifications - published version)High Energy Physics - Phenomenologytext