2015/11/30 by F. Bojarski, G. Chalons, Guillaume Chalons +4 · 4 citations
Physics and Astronomy · #Archaeology #Black Holes and Theoretical Physics #Computer science #Extension (predicate logic) #Higgs boson #History #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Programming language #Quantum Chromodynamics and Particle Interactions #Singlet state #Standard Model (mathematical formulation) #hep-ph
paper · pdf · doi:10.1007/jhep02(2016)147
35 pages (plus appendix and references), 11 Figures, 10 Tables. V2: minor changes updated, matching the published journal version
openalex publication_date 2016/02/01 · arxiv created 2016/03/29 · arxiv updated 2016/03/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the decay of a heavy Higgs boson into a light Higgs pair at one loop in the singlet extension of the Standard Model. To this purpose, we construct several renormalization schemes for the extended Higgs sector of the model. We apply these schemes to calculate the heavy-to-light Higgs decay width Γ H → hh at next-to-leading order electroweak accuracy, and demonstrate that certain prescriptions lead to gauge-dependent results. We comprehensively examine how the NLO predictions depend on the relevant singlet model parameters, with emphasis on the trademark behavior of the quantum effects, and how these change under different renormalization schemes and a variable renormalization scale. Once all present constraints on the model are included, we find mild NLO corrections, typically of few percent, and with small theoretical uncertainties.