Hard exclusive QCD processes

Hard exclusive processes in high energy electron proton scattering offer the opportunity to get access to a new generation of parton distributions, the so-called generaliyed parton distributions (GPDs). This functions provide more detailed infomartions about the structure of the nucleon than the usual PDFs obtained from DIS. In this work we present a detaild analysis of exclusive processes, especially of hard exclusive meson production. We investigated the influence of exclusive produced mesons on the semi-inclusive production of mesons at fixed target experiments like HERMES. Further we give a detailed analysis of higher order corrections (NLO) for the exclusive production of mesons in a very broad range of kinematics