Baryon resonance analysis from MAID

作     者：L. Tiator D. Drechsel S.S. Kamalov M. Vanderhaeghen 

作者机构：Institut fr Kernphysik Universitt Mainz D-55099 Mainz Germany Bogoliubov Laboratory for Theoretical Physics JINR Dubna 141980 Moscow Region Russia 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2009年第33卷第12期

页      面：1069-1076页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported by Deutsche Forschungsgemeinschaft through SFB 443 joint Russian-German Heisenberg-Landau program 

主　　题：pion photo- and electroproduction non-strange baryons transition form factors 

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-Q2 and Q2 dependent transition form factors could be obtained for the Delta, Roper, D13（1520）, S11 （1535）, S31 （1620）, $11（1650）, D15（1675）, F15（1680） and P13（1720）. From the complete world data base, including also π data on the neutron, also Q2 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 S11 and D13 resonances.