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Decay $phi (1020) o gamma f_0(980)$: analysis in the non-relativistic quark model approach | A.V. Anisovich
; V.V. Anisovich
; V.N. Markov
; V.A. Nikonov
; A.V. Sarantsev
; | Date: |
11 Mar 2004 | Subject: | hep-ph | Abstract: | We demonstrate the possibility of a good description of the processes $phi (1020) o gammapipi$ and $phi (1020) o gamma f_0(980)$ 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 $M_{pipi} o m_phi$ and $m_{f_0} o m_phi$. In conclusion the arguments favouring the $qar q$ origin of $f_0(980)$ are listed. | Source: | arXiv, hep-ph/0403123 | Services: | Forum | Review | PDF | Favorites |
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