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

Abstract

We calculate the large top quark mass expansions for the H -> bb_bar decay rate in the order (alpha_s)^2 and for the H -> gluons decay rate in the order (alpha_s)^3. The obtained expansions rapidly converge in the region of their validity, M_H < 2 m_top, i.e. below the threshold of tt_bar production.

Comments: 9 pages, a postscript file that includes 1 figure is available via anonymous ftp at ftp://nikhefh.nikhef.nl/pub/preprints/95-027.ps.Z