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Radiative decays of mesons and an extended vector-meson dominance model

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Il Nuovo Cimento A (1971-1996)

Summary

A model describing the radiative P→γγ, V→Pγ, P→PPγ and the strong V→PPP decays is proposed. The amplitudes for processes with a three-particle final state are approximated by finite dispersion relations and the coupling constants are related by the quark model. Predictions derived from usual VMD are only in qualitative agreement with experiments. Better agreement is achieved by extending VMD with the inclusion of further vector mesons.

Riassunto

Si propone un modello per descrivere i decadimenti radiativi P→γγ, V→Pγ, P→PPγ ed i decadimenti forti V→PPP. Le ampiezze per processi con tre particelle nello stato finale sono descritte per mezzo di relazioni di dispersione finite e le costanti di accoppiamento sono fra loro collegate tramite il modello a quark. Le predizioni derivate dall’usuale predominio del mesone vettoriale sono soltanto in accordo qualitativo con gli esperimenti. Un migliore accordo si ricava estendendo il predominio del mesone vettoriale con l’inclusione di ulteriori mesoni vettoriali.

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Author notes

  1. A. Bramón

    Present address: Departamento de Física Teòrica, Barcelona

Authors and Affiliations

  1. Laboratori Nazionali del CNEN, Frascati

    A. Bramón & M. Greco

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  1. A. Bramón
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  2. M. Greco
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Bramón, A., Greco, M. Radiative decays of mesons and an extended vector-meson dominance model. Nuov Cim A 14, 323–334 (1973). https://doi.org/10.1007/BF02728956

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  • DOI: https://doi.org/10.1007/BF02728956

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