Higgs Decay to Gluons at NNLO

Details Higgs Decay to Gluons at NNLO Higgs Decay to Gluons at NNLO

2007-08-07

arxiv.org/abs/0708.0916v2

Phys.Lett.B655:148-155,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, minor corrections, references corrected and added, to be published in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2007.08.080

We present an analytical calculation of the next-to-next-to-leading order corrections to the partial decay width $H\to gg$ for a Higgs boson in the intermediate mass range. We apply an asymptotic expansion for $M_H\ll 2M_t$ and compute three terms in the expansion. The leading term confirms the results present in the literature. It is argued that our result is equivalent to an exact calculation up to $M_H\approx M_t$. For a Higgs boson mass of 120 GeV the power-suppressed terms lead to corrections of about 9% in the next-to-next-to-leading order coefficient.

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