dorsal/arxiv
View SchemaSpin effects and baryon resonance dynamics in phi-meson photoproduction at few GeV
| Authors | A. I. Titov, T. -S. H. Lee |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0305002 |
| URL | https://arxiv.org/abs/nucl-th/0305002 |
| DOI | 10.1103/PhysRevC.67.065205 |
| Journal | Phys.Rev. C67 (2003) 065205 |
Abstract
The diffractive $\phi$-meson photoproduction amplitude is dominated by the Pomeron exchange process and contains the terms that govern the spin-spin and spin-orbital interactions. We show that these terms are responsible for the spin-flip transitions at forward photoproduction angles and appear in the angular distributions of $\phi\to K^+K^-$ -decay in reactions with unpolarized and polarized photon beams. At large momentum transfers, the main contribution to the $\phi$-meson photoproduction is found to be due to the excitation of nucleon resonances. Combined analysis of $\omega$ and $\phi$ photoproduction indicates strong OZI-rule violation in $\phi NN^*$ - couplings. We also show that the spin observables are sensitive to the dynamics of $\phi$-meson photoproduction at large angles and could help distinguish different theoretical models of nucleon resonances. Predictions for spin effects in $\phi$-meson photoproduction are presented for future experimental tests.
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"abstract": "The diffractive $\\phi$-meson photoproduction amplitude is dominated by the\nPomeron exchange process and contains the terms that govern the spin-spin and\nspin-orbital interactions.\n We show that these terms are responsible for the spin-flip transitions at\nforward photoproduction angles and appear in the angular distributions of\n$\\phi\\to K^+K^-$ -decay in reactions with unpolarized and polarized photon\nbeams.\n At large momentum transfers, the main contribution to the $\\phi$-meson\nphotoproduction is found to be due to the excitation of nucleon resonances.\n Combined analysis of $\\omega$ and $\\phi$ photoproduction indicates strong\nOZI-rule violation in $\\phi NN^*$ - couplings.\n We also show that the spin observables are sensitive to the dynamics of\n$\\phi$-meson photoproduction at large angles and could help distinguish\ndifferent theoretical models of nucleon resonances.\n Predictions for spin effects in $\\phi$-meson photoproduction are presented\nfor future experimental tests.",
"arxiv_id": "nucl-th/0305002",
"authors": [
"A. I. Titov",
"T. -S. H. Lee"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.67.065205",
"journal_ref": "Phys.Rev. C67 (2003) 065205",
"title": "Spin effects and baryon resonance dynamics in phi-meson photoproduction at few GeV",
"url": "https://arxiv.org/abs/nucl-th/0305002"
},
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