Baryon resonance analysis from MAID

摘要：

The unitary isobar model MAID2007 has been used to analyze the recent data of pion electroproduction. The model contains all four-star resonances in the region below W=2 GeV and both single-Q~2 and Q~2 dependent transition form factors could be obtained for the Delta, Roper, D_(13)(1520), S_(11) (1535), S_(31) (1620), S_(11)(1650), D_(15)(1675), F_(15)(1680) and P_(13)(1720). From the complete world data base, including also π~-data on the neutron, also Q~2 dependent neutron form factors are obtained. For all transition form factors we also give convenient numerical parameterizations that can be used in other reactions. Furthermore, we show how the transition form factors can be used to obtain empirical transverse charge densities and our first results are given for the Roper, the S_(11) and D_(13) resonances.

关键词： pion photo- and electroproduction non-strange baryons transition form factors

作者: L.Tiator D.Drechsel S.S.Kamalov M.Vanderhaeghen

作者单位: Institut für Kernphysik,Universitat Mainz,D-55099 Mainz,Germany Bogoliubov Laboratory for Theoretical Physics,JINR,Dubna,141980 Moscow Region,Russia

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: 1069-1076

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）