Hadro-and photo-production of in quasi-free proton and neutron processes

摘要：

The ηphoto production process on quasi-free proton and neutron and the reaction NN→ηNN are investigated within a relativistic effective Lagrangian approach to hadronic interactions. Resonances with spins 1/2 and 3/2 are considered together with the nucleonic and t-channel meson-exchange current contributions. In photoproduction processes, the S_(11) resonance is found to be responsible for the sharp rise of the cross sections near threshold. In pp →ηpp, it is found that the S_(11) resonance dominates the total cross section over the entire energy region considered. The spin observables, in particular the beam and target asymmetries, are shown to be very sensitive to the reaction mechanism and will help impose more stringent constraints on the model parameters.

关键词： η production free and quasi-free photoproduction meson production in NN collisions

作者: HUANG Fei K.Nakayama

作者单位: Department of Physics and Astronomy,University of Georgia,Athens,GA 30602,USA Department of Physics and Astronomy,University of Georgia,Athens,GA 30602,USA;Institut fur Kernphysi

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: 1291-1295

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）