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The radiative decays $ϕ\toγa_0/f_0$ in the molecular model for the scalar mesons

Yu. S. Kalashnikova·A. E. Kudryavtsev·A. V. Nefediev·C. Hanhart·J. Haidenbauer
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Abstract

We investigate the radiative decays of the $ϕ$ meson to the scalar mesons $a_0(980)$ and $f_0(980)$. We demonstrate that, contrary to earlier claims, these decays should be of the same order of magnitude for a molecular state and for a compact state and, therefore, the available experimental information is consistent with both, a molecular as well as a compact structure of the scalars. Thus, the radiative decays of the $ϕ$ meson into scalars establish a sizable $K\bar K$ component of the scalar mesons, but do not allow to discriminate between molecules and compact states.

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Yu. S. Kalashnikova, A. E. Kudryavtsev, A. V. Nefediev, C. Hanhart, J. Haidenbauer. 2005-06-24. The radiative decays $ϕ\toγa_0/f_0$ in the molecular model for the scalar mesons. https://doi.org/10.1140/epja%2Fi2005-10008-4

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