A Multi - Regge Model Applied to High - Energy Inclusive Photoproduction

T’ We compare inclusive photoproduction dat$ in the energy range :, ,*.z 3 E Y = 9.0 18.0 GeV to the multi-Regge.. model. ,,The model jncorporates vector-dominance coupling of the photon, the ChewPignotti algorithm for charge as signrnent, and correct treatment of n-bodyphase space. A technique of ordering the particles according to longitudinal momentum is used to enhance features of the data and provide a more sensitive test of the model. We compare the model to mass distributions, separation of particles in rapidity, longitudinal momentukn dis ‘, c tributions, topological cross-sections and charge orderings of second:_. _ -_-’ : :.: aries. _ A reasonable description of the data is achieved, using paramt eters derived from pp .and K p experiments. :g Supported by the U. S. Atomic Energy Commission. ‘Participating guest at LBL. tt NOW at Stanford Linear Accelerator Center, Stanford, California 94305. \, (Sub. to Nuclear Physics)