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 — preprints:2006:ttp06-14 [2016/03/17 11:03] (current) Line 1: Line 1: + ====== TTP06-14 Top Quark Mediated Higgs Decay into Hadrons to Order $\alpha_s^5$ ====== + + + <​hidden TTP06-14 ​ Top Quark Mediated Higgs Decay into Hadrons to Order $\alpha_s^5$ > We present in analytic form the O(alpha_s^5) correction to the H->gg + ​partial width of the standard-model Higgs boson with intermediate mass + ​M_H<​2M_t. Its knowledge is useful because the O(alpha_s^4) correction + is sizeable (around 20%). For M_H=120 GeV, the resulting QCD + ​correction factor reads + 1 + (215/12) alpha_s^(5)(M_H)/​pi + + 152.5 (alpha_s^(5)(M_H)/​pi)^2 + + 381.5 (alpha_s^(5)(M_H)/​pi)^3 + ​\approx 1+0.65+0.20+0.02. + The new four-loop correction increases the total Higgs-boson hadronic + width by a small amount of order 1 promille and stabilizes + ​significantly the residual scale dependence. + ​ + |**P.A. Baikov and K.G. Chetyrkin** ​ | + |**  Phys. Rev. Lett.  97 061803 2006  **  | + | {{preprints:​2006:​ttp06-14.pdf|PDF}} {{preprints:​2006:​ttp06-14.ps|PostScript}} [[http://​arxiv.org/​abs/​hep-ph/​0604194|arXiv]] ​  | + | |