Decay $φ(1020)\to γf_0(980)$: analysis in the non-relativistic quark model approach

Details Decay $φ(1020)\to γf_0(980)$: analysis in the non-relativistic quark model approach Decay $φ(1020)\to γf_0(980)$: analysis in the non-relativistic quark model approach

2004-03-11

arxiv.org/abs/hep-ph/0403123v2

Phys.Atom.Nucl.68:1554-1572,2005; Yad.Fiz.68:1614-1632,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages, some typos corrected

Scientific paper

10.1134/1.2053339

We demonstrate the possibility of a good description of the processes $\phi (1020)\to \gamma\pi\pi$ and $\phi (1020)\to \gamma f_0(980)$ within the framework of non-relativistic quark model assuming $f_0(980)$ to be dominantly quark--antiquark system. Different mechanisms of the radiative decay, that is, the emission of photon by the constituent quark (additive quark model) and charge-exchange current, are considered. We also discuss the status of the threshold theorem applied to the studied reactions, namely, the behaviour of the decay amplitude at $M_{\pi\pi} \to m_\phi$ and $m_{f_0}\to m_\phi$. In conclusion the arguments favouring the $q\bar q$ origin of $f_0(980)$ are listed.

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