Higgs Decay to Order \α_s⁴

1997/05/06 by K.G. Chetyrkin, K. G. Chetyrkin, B. A. Kniehl +2 · 11 citations
Physics and Astronomy · #Alpha (finance) #Approx #Black Holes and Theoretical Physics #Boson #Hadron #Higgs boson #High-Energy Particle Collisions Research #Nuclear physics #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Standard Model (mathematical formulation) #Statistics #hep-ph

paper · pdf · doi:10.1103/physrevlett.79.353

published as Phys.Rev.Lett. 79 (1997) 353-356 · Latex, 7 pages, 1 ps-figure

arxiv created 1997/05/06 · openalex publication_date 1997/05/07 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We present in analytic form the three-loop O(\α_s²) correction to the H -> gg partial width of the standard-model Higgs boson with intermediate mass M_H << 2 M_t. Its knowledge is required because the O(\α_s) correction is so sizeable that the theoretical prediction to this order is unlikely to be reliable. For M_H=100 GeV, the resulting QCD correction factor reads 1+(215/12)\α_s⁽⁵⁾(M_H)/\π+150.419 (\α_s⁽⁵⁾(M_H)/\π)² \≈ 1+0.66+0.21. The new three-loop correction increases the Higgs-boson hadronic width by an amount of order 1%.

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