2000/06/30 by Fulvia De Fazio, F. De Fazio, M. R. Pennington +1 · 42 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Mixing (physics) #Particle physics theoretical and experimental studies #QCD sum rules #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Radiative transfer #Standard Model (mathematical formulation) #Sum rule in quantum mechanics #hep-ph
paper · pdf · doi:10.1088/1126-6708/2000/07/051
published in Journal of High Energy Physics 2000(07), 051 (Springer Nature) · Latex, 15 pages, 3figures. Some typos corrected
openalex publication_date 2000/07/28 · arxiv created 2001/07/31 · arxiv updated 2015/06/25 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The radiative transitions ϕ→ ηγ and ϕ→ η^′ γ are analysed using QCD sum-rules. The results we obtain for \cal B(ϕ→ ηγ)=(1.15 ± 0.2) 10-2 and \cal B(ϕ→ η^′ γ)=(1.18 ± 0.4) 10-4 are in very good agreement with existing experimental data. The related issue of η-η^′ mixing is discussed and we give predictions for the η and η^′ decay constants in the framework of a mixing scheme in the quark-flavour basis.