ω-meson photoproduction on nucleons in the near-threshold region

被引：7
作者：
Babacan, H [1 ]
Babacan, T [1 ]
Gokalp, A [1 ]
Yilmaz, O [1 ]
机构：
[1] Middle E Tech Univ, Phys Dept, TR-06531 Ankara, Turkey
来源：
EUROPEAN PHYSICAL JOURNAL A | 2002年 / 13卷 / 03期
关键词：
D O I：
10.1007/s10050-002-8764-7
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 omega-meson photoproduction, gamma + p --> p + omega, is studied in the framework of a model, containing pi-meson exchange in t-channel and nucleon-exchange in s- and u-channels. Considering both omegaNN, coupling constants in the region of time-like meson four-momenta as the free parameters, we find different sets of solutions for these constants from the existing data on the l-dependence of the differential cross-sections, dsigma(gamma + p --> p + omega)/dl, in the near-threshold region Egamma less than or equal to 2 GeV. These sets of,earn coupling constants, corresponding to destructive and constructive pi X N-interference contributions to dsigma/dt can be well distinguished by measurements of beam asymmetry, induced by linear photon polarization.
引用
收藏
页码：355 / 362
页数：8
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