Spin effects and baryon resonance dynamics in φ-meson photoproduction at few GeV -: art. no. 065205

被引：55
|
作者：
Titov, AI [1 ]
Lee, TSH
机构：
[1] Japan Atom Energy Res Inst, Adv Sci Res Ctr, Ibaraki 3191195, Japan
[2] Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Russia
[3] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA
来源：
PHYSICAL REVIEW C | 2003年 / 67卷 / 06期
关键词：
D O I：
10.1103/PhysRevC.67.065205
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
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-->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 Okubo-Zweig-Iizuka-rule violation in phiNN* couplings. We also show that the spin observables are sensitive to the dynamics of phi-meson photoproduction at large angles and could help to distinguish different theoretical models of nucleon resonances. Predictions for spin effects in phi-meson photoproduction are presented for future experimental tests.
引用
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页数：17
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