The large top quark mass expansion for Higgs boson decays into bottom quarks and into gluons The large top quark mass expansion for Higgs boson decays into bottom quarks and into gluons

We calculate the large top quark mass expansions for the H → bb decay rate in the order αs2 and for the H → gluons decay rate in the order αs3. The obtained expansions rapidly converge in the region of their validity, MH < 2mt, i.e. below the threshold of tt production.