Possible method in some extensions of the standard model to produce and detect Higgs bosons at hadron colliders

If an SU(2)-singlet quark (we call it D) with mass on the weak scale exists, for which there is some motivation, it can have a large decay to a normal quark plus a Higgs boson, e.g., D→b+$H^0$. If $M_D$≲150 GeV, this converts present-day hadron colliders from being unlikely to detect Higgs bosons into useful Higgs boson factories, &≲${\mathrm{M}}_{\mathrm{Z}}$.