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

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

2001-04-27

arxiv.org/abs/hep-ph/0104289v2

Phys.Lett.B521:15-21,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 11 pages, 2 eps figures. Final version to apper in Physics Letters B

Scientific paper

10.1016/S0370-2693(01)01200-X

We consider the radiative transition $\phi \to f_0 \gamma$, 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: ${\cal B}(\phi \to f_0 \gamma)=(2.7 \pm 1.1) ~ 10^{-4}$, 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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