We study the top quark chromomagnetic factor κt​-dependence of the
effective interaction Lhgg​ and apply the result to the case of
Higgs two gluon decay rate Γh→gg​. Perturbative standard model
provides κt​<2, and for the standard model value Γh→gg​(κt​) is suppressed by 9% as compared to κt​=2. We further
show that in the leading order Γh→gg​ for κt​≃±1.2
can be very small due to complete cancelation between the top and bottom quark
fluctuations. We discuss the extension of our results to κt​>2 and
consider potential paths to obtain experimental information for the h→gg
rate.Comment: 4 pages, 3 figures, elsarticle format, v2 added section "Gluon Fusion
into Higgs