On Radiative $φ\to ηγ$, $φ\to η^\prime γ$ Decays

Details On Radiative $φ\to ηγ$, $φ\to η^\prime γ$ Decays On Radiative $φ\to ηγ$, $φ\to η^\prime γ$ Decays

2000-07-24

arxiv.org/abs/hep-ph/0007260v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

We use QCD sum-rules to study the decays $\phi \to \eta \gamma$ and $\phi \to \eta^\prime \gamma$, obtaining ${\cal B}(\phi \to \eta \gamma)=(1.15 \pm 0.2) 10^{-2}$ and ${\cal B}(\phi \to \eta^\prime \gamma)=(1.18 \pm 0.4) 10^{-4}$, in very good agreement with existing experimental data. We also discuss the issue of $\eta-\eta^\prime$ mixing, predicting the $\eta$ and $\eta^\prime$ decay constants in a mixing scheme in the quark-flavour basis.

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