2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/36738Data collected with the ALEPH detector at centre-of-mass energies between 130 and 189 GeV are used to search for Higgs bosons of the standard model and its supersymmetric extensions. No evidence for a Higgs particle has been found in 256 pb^-1 of LEP2 data. Mass exclusion limits were set.8 pages, 5 figures; LaTeX (sprocl.sty). Talk given at the Lake Louis Winter Institute, Canada, 14-20 February 1999. To appear in the proceedings (published by World Scientific)High Energy Physics - Experimenttext