Resonance properties from a coupled channel meson ezchange model

摘要：

In this talk, I present the results on the pole structure of pion-nucleon scattering in an analytic model based on meson exchange. The analytic properties of scattering amplitudes provide important informa-tion. Besides the cuts, the poles and zeros on the different Riemann sheets determine the global behavior of the amplitude on the physical axis. Pole positions and residues allow for a parameterization of resonances in a well-defined way, free of assumptions for the background and energy dependence of the resonance part. This is a necessary condition to relate resonance contributions in different reactions.

关键词： pion-nucleon scattering meson ezchange model analytic structure of the scattering amplitude

作者: M.D(o)ring C.Hanhart HUANG Fei S.Krewald U.-G.Mei(β)ner

作者单位: Institut fur Kernphysik and Julich Center for Hadron Physics,Forschungszentrum Julich,D-52425 Jülich Institut fur Kernphysik and Julich Center for Hadron Physics,Forschungszentrum Julich,D-52425 Julich Department of Physics and Astronomy,University of Georgia,Athens,Georgia 30602,USA Institut fur Kernphysik and Julich Center for Hadron Physics,Forschungszentrum Julich,D-52425 Julich

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: 1273-1278

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）