English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The radiative transitions $\phi \to \eta \gamma$ and $\phi \to \eta^\prime\gamma$ are analysed using QCD sum-rules. The results we obtain for ${\calB}(\phi \to \eta \gamma)=(1.15 \pm 0.2) 10^{-2}$ and ${\cal B}(\phi \to\eta^\prime \gamma)=(1.18 \pm 0.4) 10^{-4}$ are in very good agreement withexisting experimental data. The related issue of $\eta-\eta^\prime$ mixing isdiscussed and we give predictions for the $\eta$ and $\eta^\prime$ decayconstants in the framework of a mixing scheme in the quark-flavour basis.Comment: Latex, 15 pages, 3figures. Some typos correcte

Radiative phi-meson decays and η−η′ mixing: a QCD sum rule analysis