Higher order QCD results for the fermionic contributions of the Higgs-boson decay into two photons and the decoupling function for the MS MS ¯ renormalized fine-structure constant

2014/04/13 by Christian Sturm
Physics and Astronomy · #Boson #Decoupling (probability) #Fine-structure constant #Higgs boson #High-Energy Particle Collisions Research #Nuclear physics #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Perturbative QCD #Photon #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum electrodynamics #Quantum mechanics #Quark #Top quark #hep-ph

paper · pdf · doi:10.1140/epjc/s10052-014-2978-0

published as Eur. Phys. J. C (2014) 74:2978 · 19 pages, 4 figures

arxiv created 2014/04/13 · openalex publication_date 2014/08/01 · arxiv updated 2014/08/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We compute the decoupling function of the MS renormalized fine-structure constant up to four-loop order in perturbative QCD. The results are used in order to determine the related top-quark contributions to the Higgs-boson decay into two photons in the heavy top-quark mass limit to order α _s⁴ .

Citations

• Automatic application of successive asymptotic expansions of Feynman diagrams
• Review of Particle Physics
• Extension of the functionality of the symbolic program FORM by external software
• New features of FORM
• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Four-loop singlet contribution to the electroweak ρ parameter
• Four-loop moments of the heavy quark vacuum polarization function in perturbative QCD
• High-precision ϵ-expansions of massive four-loop vacuum bubbles
• Integration by parts: The algorithm to calculate β-functions in 4 loops
• Heavy-quark QCD vacuum polarisation function: analytical results at four loops
• Tuning FORM with large calculations
• The three-loop relation between the and the pole quark masses
• High-precision epsilon expansions of single-mass-scale four-loop vacuum bubbles
• On the enumeration of irreducible k-fold Euler sums and their roles in knot theory and field theory
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC