Nucleonic resonance effects in the $\phi$ meson photoproduction
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Nucleonic resonance effects in the $\phi$ meson photoproduction
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| Id. |
542611 |
| Titulo |
Nucleonic resonance effects in the $\phi$ meson photoproduction |
| Autor(es) |
Zhao, Q.
Didelez, J. -P.
Guidal, M.
Saghai, B.
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| Localización |
http://arxiv.org/abs/nucl-th/9906013
Nucl.Phys. A660 (1999) 323-347
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| Versión |
1.0 |
| Estado |
Final
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| Descripción |
The process $\gamma p \to \phi p$ close to threshold is investigated focusing
on the role played by the {\it s}- and {\it u}-channel nucleonic resonances.
For this purpose, a recent quark model approach, based on the $SU(6)\otimes
O(3)$ symmetry with an effective Lagrangian, is extended to the $\phi$ meson
photoproduction. Another non-diffractive process, the {\it t}-channel $\pi^0$
exchange, is also included. The diffractive contribution is produced by the
{\it t}-channel Pomeron exchange. Contributions from non-diffractive {\it s}-
and {\it u}-channel process are found small in the case of cross sections and
polarization observables at forward angles. However, backward angle
polarization asymmetries show high sensitivity to this non-diffractive process.
Different prescriptions to keep gauge invariance for the Pomeron exchange
amplitudes are investigated. Possible deviations from the exact $SU(6)\otimes
O(3)$ symmetry, due to the configuration mixing, are also discussed.
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| Palabras clave |
Nuclear Theory
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| Tipo de recurso |
Texto Narrativo
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| Tipo de Interactividad |
Expositivo
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| Nivel de Interactividad |
muy bajo
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| Audiencia |
Estudiante
Profesor
Autor
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| Estructura |
Atomic |
| Coste |
no
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| Copyright |
sí
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| Requerimientos técnicos |
Browser: Any
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| Fecha de contribución |
27-mar-2007 |
| Contacto |
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