2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/43279Interesting contributions to $Δa_μ$ from a two-Higgs-doublet-model is coming from a two-loop Barr-Zee diagram for most part of the parameter space -- a fact that has been overlooked by some Higgs/SUSY experts. A definite positive contribution has requirements that go against precision EW data and other known constraints. For the case without SUSY, in particular, this is almost enough to kill the two-Higgs-doublet-model (II). We will discuss the interplay of all the constraints and their implications.1+4 pages of latex with ws-procs9x6.cls,5 figure postscripts included; talk at SUSY03High Energy Physics - Phenomenologytext