IN-MEDIUM RELATIVISTIC KINETIC-THEORY AND NUCLEON-MESON SYSTEMS

Within the sigma - omega model of coupled nucleon-meson systems, a gen eralized relativistic Lennard-Balescu-equation is presented resulting from a relativistic random phase approximation (RRPA). This provides a systematic derivation of relativistic transport equations in the fram e of nonequilibrium Green's function technique including medium effect s as well as fluctuation effects. It contains all possible processes d ue to one-meson exchange and special attention is kept to the off-shel l character of the particles. As a new feature of many-particle effect s, processes are possible, which can be interpreted as particle creati on and annihilation due to in-medium one-meson exchange. In-medium cro ss sections are obtained from the generalized derivation of collision integrals, which possess complete crossing symmetries.