Single photo and electroproduction of pions at EBAC@JLAB

摘要：

Within the Excited Baryon Analysis Center we have performed a dynamical coupled-channels analysis of the available p(e,eπ)N data in the region of W≤1.6 GeV and Q~2≤1.45 (GeV/c)~2.The channels included are γN, πN, ηN, and ππN which has π△, ρN, and σN components. With the hadronic parameters of the model determined in our previous investigations of πN→πN reaction, we have found that the available data in the considered W≤1.6 GeV region can be fitted well by only adjusting the bare γ~*N→N~* helicity amplitudes for the lowest N~* states in P_(33), P_(11), S_(11) and D_(13) partial waves. The meson cloud effect, as required by the unitarity conditions, on the γ~*N→ N~* form factors are examined.

关键词： meson electroproduction helicity amplitudes

作者: B.Juliá-Díaz

作者单位: Department dEstructura i Constituents de la Materia and Institut de Ciencies del Cosmos,Universitat de Barcelona,E-08028 Barcelona,Spain;Excited Baryon Analysis Center (EBAC),Thomas Jefferson National Accelerator Facility,Newport News,VA 23606,USA

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: 1296-1301

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）