Résumé du preprint Irfu-08-127

Irfu-08-127
Selected aspects of scattering and annihilation reactions
E. Tomasi-Gustafsson, G.I. Gakh, C. Adamuscin
Model independent properties of the spin density matrix and of polarization observables for electron hadron scattering and electron positron annihilation in specific channels are presented. Particular attention is devoted to the extraction and the properties of hadron form factors, as well as to the reaction mechanism.