On Radiative ϕ→ ηγ, ϕ→ η^′ γ Decays

2000/07/24 by Fulvia De Fazio, De Fazio, Fulvia, M. R. Pennington +1
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/0007260

LatTeX, 6 pages. Talk given by F. De Fazio at LNF Spring School in Nuclear, Subnuclear and Astroparticle Physics, 15-20 May 2000 Frascati - Italy Some typos corrected

arxiv created 2001/07/31 · arxiv updated 2009/11/30

Abstract

We use QCD sum-rules to study the decays ϕ→ ηγ and ϕ→ η^′ γ, obtaining \cal B(ϕ→ ηγ)=(1.15 ± 0.2) 10^-2 and \cal B(ϕ→ η^′ γ)=(1.18 ± 0.4) 10^-4, in very good agreement with existing experimental data. We also discuss the issue of η-η^′ mixing, predicting the η and η^′ decay constants in a mixing scheme in the quark-flavour basis.

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