Pion-Nucleon Distribution Amplitudes

In recent years there has been increasing attention to hard exclusive processes involving emission of soft pions in the final state. In the near future new experimental data will emerge and their interpretation requires information about the nucleon wave function. Such processes are attractive as they provide us new insights in the hadron (nucleon) structure. At this point the nucleon distribution amplitudes (DAs) play an important role, as they contain direct information about the wave function. Our aim will be to treat the outgoing nucleon and produced π as a Nπ final state and describe the Nπ DAs in terms of nucleon DAs. The main physical tool we use to calculate such Nπ DAs is the well known soft-pion theorem. Everything is considered to be at threshold.