2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/185284We investigate the SM Higgs decays into heavy quarkonia J/ψand Υin both color-singlet and color-octet mechanisms. It is found that in J/ψproduction the contribution through color-octet processes overwhelm that in color-singlet processes all the intermediate region M_Z<M_{H^0}<2 M_w and the fraction ratio is comparatively large, but in Υproduction the contribution through color-octet mechanism is negligible.9 pages, LaTex, 4 postscript figures. To appear in Journal of Physics GHigh Energy Physics - Phenomenologytext