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Probing the structure of $f_0(980)$ through radiative $ϕ$ decays

F. De Fazio·M. R. Pennington
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Abstract

We consider the radiative transition $ϕ\to f_0 γ$, which is a sensitive probe of the nature of the $f_0(980)$ particle. Using the QCD sum-rule technique, we estimate the branching ratio of such decay mode to be: ${\cal B}(ϕ\to f_0 γ)=(2.7 \pm 1.1) ~ 10^{-4}$, in fair agreement with present experimental data. As for the structure of the $f_0$, the result suggests a sizeable $s {\bar s}$ component; however, this result does not exclude the possibility of further components and allows a more complex structure than indicated by the naive quark model.

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F. De Fazio, M. R. Pennington. 2001-06-11. Probing the structure of $f_0(980)$ through radiative $ϕ$ decays. https://doi.org/10.1016/s0370-2693(01)01200-x

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