Corrections of O(α_s^2) to the Decay of an Intermediate-Mass Higgs Boson into Two Photons

Details Corrections of O(α_s^2) to the Decay of an Intermediate-Mass Higgs Boson into Two Photons Corrections of O(α_s^2) to the Decay of an Intermediate-Mass Higgs Boson into Two Photons

1996-12-18

arxiv.org/abs/hep-ph/9612395v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, LaTeX, 13 postscript figures. Contribution to the proceedings of the Ringberg Workshop, Tegernsee, Germany, 8-13 Dece

Scientific paper

The QCD correction of $O(\alpha_s^2)$ to the decay of the Standard Model Higgs boson into two photons is presented. We consider the contribution coming from diagrams with a heavy top quark as virtual particle. The first three terms of the expansion in the inverse top mass is calculated. Expressing the result through the on-shell top mass M_t, we find large coefficients for the power-suppressed terms whereas in the $\overline{MS}$ scheme the coefficients are tiny.

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