Top Quark Mediated Higgs Decay into Hadrons to Order alpha(s)**5
High Energy Physics - Phenomenology
2016-09-06 v2
Abstract
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.
Cite
@article{arxiv.hep-ph/0604194,
title = {Top Quark Mediated Higgs Decay into Hadrons to Order alpha(s)**5},
author = {P. A. Baikov and K. G. Chetyrkin},
journal= {arXiv preprint arXiv:hep-ph/0604194},
year = {2016}
}
Comments
4 pages, the final text published in Phys. Rev. Lett