On Radiative ϕ→ ηγ, ϕ→ η′ γ Decays
De Fazio, Fulvia · Pennington, M. R.
Original · EN
We use QCD sum-rules to study the decays ϕ→ ηγ and ϕ→ η′ γ, obtaining B(ϕ→ ηγ)=(1.15 ± 0.2) 10⁻² and 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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