dorsal/arxiv
View SchemaNucleonic resonance effects in the $\phi$ meson photoproduction
| Authors | Q. Zhao, J. -P. Didelez, M. Guidal, B. Saghai |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9906013 |
| URL | https://arxiv.org/abs/nucl-th/9906013 |
| DOI | 10.1016/S0375-9474(99)00398-X |
| Journal | Nucl.Phys. A660 (1999) 323-347 |
Abstract
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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"abstract": "The process $\\gamma p \\to \\phi p$ close to threshold is investigated focusing\non the role played by the {\\it s}- and {\\it u}-channel nucleonic resonances.\nFor this purpose, a recent quark model approach, based on the $SU(6)\\otimes\nO(3)$ symmetry with an effective Lagrangian, is extended to the $\\phi$ meson\nphotoproduction. Another non-diffractive process, the {\\it t}-channel $\\pi^0$\nexchange, is also included. The diffractive contribution is produced by the\n{\\it t}-channel Pomeron exchange. Contributions from non-diffractive {\\it s}-\nand {\\it u}-channel process are found small in the case of cross sections and\npolarization observables at forward angles. However, backward angle\npolarization asymmetries show high sensitivity to this non-diffractive process.\nDifferent prescriptions to keep gauge invariance for the Pomeron exchange\namplitudes are investigated. Possible deviations from the exact $SU(6)\\otimes\nO(3)$ symmetry, due to the configuration mixing, are also discussed.",
"arxiv_id": "nucl-th/9906013",
"authors": [
"Q. Zhao",
"J. -P. Didelez",
"M. Guidal",
"B. Saghai"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/S0375-9474(99)00398-X",
"journal_ref": "Nucl.Phys. A660 (1999) 323-347",
"title": "Nucleonic resonance effects in the $\\phi$ meson photoproduction",
"url": "https://arxiv.org/abs/nucl-th/9906013"
},
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