RELATIVISTIC TRANSPORT-THEORY FOR SYSTEMS CONTAINING BOUND-STATES

Using a Lagrangian which contains quarks as elementary degrees of free dom and mesons as bound states, a transport formalism is developed, wh ich allows for a dynamical transition from a quark plasma to a state. where quarks are bound into hadrons. Simultaneous transport equations for both particle species are derived in a systematic and consistent f ashion. For the mesons a formalism is used which introduces off-shell corrections to the off-diagonal Green functions. It is shown that thes e off-shell corrections lead to the appearance of elastic quark scatte ring processes in the collision integral. The interference of the proc esses <q(q)over bar>-->pi and <q(q)over bar>-->pi--><q(q)over bar> lea ds to a modification of the s-channel amplitude of quark-antiquark sca ttering.