Virtual Top-Quark Effects on the H->bb-bar Decay at Next-to-Leading Order in QCD
High Energy Physics - Phenomenology
2009-10-30 v1
Abstract
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.
Cite
@article{arxiv.hep-ph/9610456,
title = {Virtual Top-Quark Effects on the H->bb-bar Decay at Next-to-Leading Order in QCD},
author = {K. G. Chetyrkin and B. A. Kniehl and M. Steinhauser},
journal= {arXiv preprint arXiv:hep-ph/9610456},
year = {2009}
}
Comments
8 pages (Latex), 5 figures (Postscript)