Higgs Decay into Gluons up to O(α_s^3 G_F m_t^2)

Details Higgs Decay into Gluons up to O(α_s^3 G_F m_t^2) Higgs Decay into Gluons up to O(α_s^3 G_F m_t^2)

1998-09-23

arxiv.org/abs/hep-ph/9809507v1

Phys.Rev. D59 (1999) 054005

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages (revtex), 3 figures

Scientific paper

10.1103/PhysRevD.59.054005

The decay of the Standard Model Higgs boson in the intermediate-mass range into gluons is considered where special emphasis is put on the influence of the leading electroweak corrections proportional to G_F m_t^2. An effective Lagrangian approach is used where the top quark is integrated out. The evaluation of the coefficient function is performed using two different methods. The first one is concerned with the direct evaluation of the vertex diagrams and the second method is based on a low-energy theorem. In a first step the tools needed for the computation are provided namely the renormalization constants of the QCD Lagrangian are computed up to O(\alpha_s^2 G_F m_t^2). Also the decoupling constants for the strong coupling constant \alpha_s and the light quark masses relating the quantities of the full theory to the corresponding quantities of the effective one are evaluated up to order \alpha_s^2 G_F m_t^2.

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