Photoproduction of ω-Mesons at ELSA and the role of azimuthal asymmetries

摘要：

Measurements of ω photoproduction of the Crystal-Barrel/TAPS experiment at the ELSA accel-erator of Bonn University are presented which used linearly polarized tagged photon beam from threshold to E_γ=1700 MeV. The azimuthal asymmetries Σ and Σ_π indicate s-channel resonance contributions on top of the established t-channel exchange processes. These findings are further enhanced by a very first measurement of the G-asymmetry which, in addition to the polarized photon beam, also requires a longitudinally polar-ized proton target. An intuitive interpretation of the specific sensitivity of the azimuthal asymmetries to the reaction mechanisms involved is given.

关键词： baryon resonances photoproduction vector mesons polarization

作者: H.Schmieden

作者单位: Rheinische Friedrich-Wilhelms-Universitat,Physikalisches Institut,D-53115 Bonn,Germany

会议类型: 国际会议

会议名称: The 12th International Workshop on the Physics Ezcited Nucleon(2009核子共振态物理国际研讨会)

会议地点: 北京

会议语种:英文

页码: 1146-1152

在线出版日期: 2009-04-19（万方平台首次上网日期，不代表论文的发表时间）