Ultraperipheral Collisions
  Ultraperipheral collisions at heavy ion colliders use the strong Coulomb fields surrounding the ions to study photon-photon and photon-hadron processes at high energy. A number of processes of interest are discussed here. 
Kai Hencken (1), Gerhard Baur (2), Ute Dreyer (1), Dirk Trautmann (1)   ((1) Universitaet Basel, (2) Forschungszentrum Juelich)