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Nucleonic resonance effects in the $\phi$ meson photoproduction
- Source :
- Nuclear Physics A, Nuclear Physics A, Elsevier, 1999, 660, pp.323-347
- Publication Year :
- 1999
- Publisher :
- HAL CCSD, 1999.
-
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.<br />Comment: 34 pages, 16 figures, to appear in Nucl. Phys. A
- Subjects :
- Physics
Nuclear and High Energy Physics
Particle physics
Nuclear Theory
Meson
[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex]
010308 nuclear & particles physics
Quark model
Resonance
Polarization (waves)
Phi meson
01 natural sciences
Pomeron
Amplitude
0103 physical sciences
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Gauge theory
010306 general physics
Subjects
Details
- Language :
- English
- ISSN :
- 03759474
- Database :
- OpenAIRE
- Journal :
- Nuclear Physics A, Nuclear Physics A, Elsevier, 1999, 660, pp.323-347
- Accession number :
- edsair.doi.dedup.....b82c2ab70f376071914a08bc6108420f