  Possible extensions of the Standard Model predict modifications of the Higgs
couplings to gluons and to the SM top quark. The values of these two couplings
can, in general, be independent. We discuss a way to measure these interactions
by studying the Higgs production at high p_T within an effective field theory
formalism. We also propose an observable r_\pm with reduced theoretical errors
and suggest its experimental interpretation.
