2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/49268We investigate the influence of scalar gauge singlets on Higgs signals at a linear collider. These lead to a large invisible decay width of the Higgs. We find that for high luminosities ($500-1000 fb^{-1}$) one can essentially cover the allowed parameter range of the model.5 pages, 3 eps-figures includedHigh Energy Physics - Phenomenologytext