Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-10-23
Phys.Rev.Lett. 78 (1997) 594-597
Physics
High Energy Physics
High Energy Physics - Phenomenology
8 pages (Latex), 5 figures (Postscript)
Scientific paper
10.1103/PhysRevLett.78.594
By means of a heavy-top-quark effective Lagrangian, we calculate the three-loop corrections of O(alpha_s^2 G_F M_t^2) to the H->bb-bar partial decay width of the standard-model Higgs boson with intermediate mass M_H<<2M_t. We take advantage of a soft-Higgs theorem to construct the relevant coefficient functions. We present our result both in the MS-bar and on-shell schemes of mass renormalization. The MS-bar formulation turns out to be favourable with regard to the convergence behaviour. We also test a recent idea concerning the naive non-abelianization of QCD.
Chetyrkin K. G.
Kniehl Bernd A.
Steinhauser Matthias
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