Study $ω$ and $φ$ photoproduction in the nucleon isotopic channels

Details Study $ω$ and $φ$ photoproduction in the nucleon isotopic channels Study $ω$ and $φ$ photoproduction in the nucleon isotopic channels

2002-02-07

arxiv.org/abs/nucl-th/0202023v1

Physics

Nuclear Physics

Nuclear Theory

10 pages, 5 eps figures; Invited Talk given at the International Symposium on Electromagnetic Interactions in Nuclear and Hadr

Scientific paper

We present results for the photoproduction of $\omega$ and $\phi$ meson in the nucleon isotopic channles. A recently developed quark model with an effective Lagrangian is employed to account for the non-diffractive {\it s}- and {\it u}-channel processes; the diffractive feature arising from the {\it natural} parity exchange is accounted for by the {\it t}-channel pomeron exchange, while the {\it unnatural} parity exchange is accounted for by the {\it t}-channel pion exchange. In the $\omega$ production, the isotopic effects could provide more information concerning the search of "missing resonances", while in the $\phi$ production, the isotopic effects could highlight non-diffractive resonance excitation mechanisms at large angles.

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