Multipole Analysis for Pion Photoproduction with Maid and a Dynamical Models

During the last few years we have developed and extended two models for the analysis of pion photo and electroproduction, the Dynamical Model 1 (hereafter called Dubna-Mainz-Taipei (DMT) model) and the Unitary Isobar Model 2 (hereafter called MAID). The final aim of such an analysis is to shed more light on the dynamics involved in nucleon resonance excitations and to extract N resonance properties in an unambiguous way. For this purpose as a testing ground we will use benchmark data bases recently created and distributed among different theoretical groups. The crucial point in a study of N resonance properties is the separation of the total amplitude (in partial channel α = {l, j})